Censuses and surveys: the raw material of decision-making

A child who is not registered at birth does not exist for the state that governs them. They appear in no school projection, no vaccination cohort, no social protection file. In sub-Saharan Africa, 90 million children are in this situation, more than half of the 150 million children under five who are unregistered worldwide (UNICEF, 2024). Behind this statistic lies a broader question: the quality of the raw material on which every public decision rests. In West Africa, that raw material comes from two sources, population censuses and the continuous registration of vital events. The region has dramatically strengthened the first. It still lags on the second. This asymmetry is no technical detail: it is the precise point where the decision-making chain breaks.

A demographic foundation under modernization

The latest generation of censuses has considerably strengthened regional knowledge. On 9 July 2024, Senegal released the official results of its 5th General Population and Housing Census (RGPH-5), conducted in 2023-2024, establishing the national population at 18,126,390 inhabitants. Ghana, with its 2021 census, counted 30,832,019 inhabitants, a baseline now projected at 34.4 million in 2024. Côte d'Ivoire, in its 2021 census, recorded 29,389,150 inhabitants, with the World Bank's 2024 estimate raising it to 31.9 million.

At the regional level, Nigeria dominates West African demographics with 232.7 million inhabitants in 2024 according to the World Bank, more than a third of the region's population. This concentration sets a requirement: the quality of Nigeria's count determines the reliability of any regional aggregate. Yet it is precisely the most populous country that shows the greatest weaknesses in continuously tracking its population, its last general national census dating back to 2006.

West Africa is not doomed: the proof in the trajectory

A quick reading of the figures might suggest a regional fate. The trajectory says otherwise. According to UNICEF's benchmark report The Right Start in Life (2024 edition), the birth registration rate for children under five now reaches 63 % in West Africa, against 51 % for sub-Saharan Africa as a whole and 88 % in Southern Africa. Above all, UNICEF stresses that West Africa made the most significant gains over fifteen years of any sub-region on the continent. Côte d'Ivoire has exceeded 90 % of children registered, on a par with the best performances worldwide.

This point is decisive for decision-makers: it establishes that the lag is not structural but reversible. Where Eastern Africa and Middle Africa stagnate at 41 %, West Africa has shown that sustained investment in decentralized registration and digitization produces measurable results within a generation. The relevant benchmark is therefore not a distant country, it is the region's own trajectory, and that of its own internal champions.

The "why": breaking down the gaps within the region

The West African average of 63 % masks considerable intra-regional gaps, and it is in those gaps that the explanation lies. In the sample documented by the World Bank, Mali shows the highest registration rate, at 86.7 %, followed by Benin (85.6 %) and Togo (82.9 %). At the other end, Nigeria tops out at 42.6 %, the lowest rate of the seven documented countries. In other words, in the most populous country in West Africa, nearly six births out of ten escape the civil registration system.

This gap of more than 44 points between Mali and Nigeria is not explained by wealth, nor by the level of development alone. It points to identifiable institutional factors on which public policy can act directly:

• The density of registration points: a registry office too far from home turns registration into a costly trade-off for rural families (transport, a lost day, informal fees).
• Cost and delays: when the certificate is paid for or the free legal deadline has passed, registration becomes an exception rather than a universal routine.
• The degree of digitization: a centralized paper register gets lost, burns or contradicts itself; a digital register links birth, vaccination, school and identity, and makes omissions visible.
• Coupling with services: where registration is tied to maternity wards and vaccination campaigns, coverage rises mechanically, because the birth and its certificate are captured at the same moment.
• Overall statistical capacity: most countries in West and Central Africa still rank among the bottom 40 % worldwide on the World Bank's Statistical Performance Indicators.

A successful census is a photograph. A failing civil registration system is a photograph that ages without anyone updating it.

The reservoir: measuring the size of the blind spot

Quantifying the stakes gives the right measure of the effort required. A census freezes an image every ten years; between two operations, only the continuous registration of births, deaths and marriages keeps knowledge of a population up to date. At the continental level, the gap is massive. The WHO estimates that only 36 % of births are fully registered in Africa, far below the 80 % threshold required to base public decisions on data. For children under five, UNICEF puts the number of unregistered children in sub-Saharan Africa at 90 million, and recalls that more than 50 million children worldwide, though registered, hold no birth certificate.

The deficit extends beyond childhood. According to the World Bank's ID4D program data, nearly 470 million people in sub-Saharan Africa lack official proof of identity. Foundational ID coverage for adults there reaches 81 %, up from 72 % in 2017: the progress is real, but the remainder stays considerable and falls first on the poorest and most isolated populations. The failing civil registration of past years thus produces "invisible" adults today, excluded from voting, credit, formal property and social protection. The reservoir to fill is not counted in abstract percentage points: it is counted in hundreds of millions of people deprived of administrative existence, and each cohort unregistered at birth swells tomorrow's stock of undocumented adults.

Demographic pressure tightens the timeline

The need for a robust statistical apparatus also stems from one of the world's most dynamic demographic patterns. Niger has the highest fertility rate in West Africa, at 5.94 children per woman in 2024, followed by Mali (5.51). The faster a population grows, the faster a census snapshot becomes outdated, and the more strategic continuous birth registration becomes for sizing schools, health centers and infrastructure. The combination is decisive: where each year brings the largest number of new births, the system meant to capture them must be the most effective. It rarely is, and the gap between the flow to be registered and the registration capacity defines the speed at which a country widens or closes its lag.

The cost of inaction

Changing nothing has a price, and it compounds. UNICEF warns that at the current pace, and given a rapidly growing child population, sub-Saharan Africa could count more than 100 million unregistered children after 2030. The curve does not flatten: without acceleration, the lag widens in absolute terms even as the percentage slowly improves. This is the scissor effect of dynamic demographics on a slow registration system, and it explains why real percentage gains can coexist with a worsening absolute number of children left behind.

The consequences are concrete and quantifiable at country level. An unregistered child is invisible to school planning and vaccination coverage, hence more exposed to dropout and disease. In adulthood, the absence of legal identity closes access to bank accounts, credit, secure property and targeted social safety nets. For the state, the stakes are budgetary: without a reliable count of deaths, it is impossible to measure maternal or infant mortality and therefore to allocate health resources correctly; without an updated age pyramid, social transfers and teacher recruitment are calibrated blind. Inaction does not save money: it shifts the cost onto invisible allocation errors, paid for every year.

What averages hide: the CRAD angle

Saying that West Africa is at 63 % registration, or that a country shows 78 % coverage, is not enough to decide. A national average is an aggregate that dissolves precisely the information useful for action: the gap between the capital and remote rural areas, between girls and boys, between the poorest and the wealthiest households, between a municipality with a registry office and its neighbor that has none. It is in these gaps, not in the average, that the lever lies.

The CRAD approach is to produce the fine-grained measurement that makes these gaps visible and therefore actionable: disaggregation by sex, place of residence and wealth quintile; geolocation of registration centers and administrative "deserts"; coupling civil registration data with household surveys and health and school registers. This granularity changes the decision: instead of spreading effort uniformly, the state can concentrate it where the deficit is densest, measure a policy's effect year after year, and decide on facts rather than on reassuring averages. It is the difference between knowing a problem exists and knowing where, for whom and in what proportion it occurs.

Censuses and surveys: a chain, not silos

Censuses, civil registration and surveys are not competing instruments but complementary ones. The census provides the sampling frame, the backbone from which sample surveys (health, employment, living conditions) draw fine-grained information. Civil registration keeps that frame up to date between two heavy operations. DHS and MICS surveys fill what is missing in between and, paradoxically, provide the best current estimates of registration rates themselves. When one link breaks, the entire decision-making chain is weakened.

Unprecedented regional financing not to be wasted

The window of opportunity is open. On 11 May 2023, the World Bank approved 460 million dollars in IDA credits and grants for the HISWACA project (Harmonizing and Improving Statistics in West and Central Africa), Phase 1, benefiting Benin, Guinea, Guinea-Bissau, Mali, Mauritania, Niger, Senegal and The Gambia, with support to the statistical divisions of ECOWAS, WAEMU and the African Union. The objective is explicit: improve the production, regional harmonization, access and use of data, and modernize statistical systems. The diagnosis justifying it is severe: most West and Central African countries still rank among the bottom 40 % worldwide on the Statistical Performance Indicators. This financing is an opportunity; its value will depend on states' ability to turn it into durable systems rather than one-off operations.

A matter of gender and rights, not just counting

Registration is not merely a statistical act, it is the first gateway to citizenship. A birth certificate conditions school enrollment at the right age, protection against early marriage and child labor, access to care and, later, the right to vote and to inherit. The children most often absent from registers are also the most vulnerable: poor households, isolated rural areas, displaced populations. Measuring registration finely therefore also means making visible those whom the system leaves aside, and turning data into an instrument of inclusion rather than a mere dashboard.

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