Nigeria is made up of 36 states and a Federal Capital Territory, grouped into six geopolitical
zones. A census conducted in 2006 put Nigeria’s population at 140 million
with an annual growth rate of 2.9 percent. Nigeria’s population as at mid 2012 was
about 150 million.
The National Bureau of Statistics (NBS), Nigeria’s National Statistical Organization
conducts household-based national surveys on regular basis to measure various
socioeconomic indicators at the state and national levels or according to the needs of
different sponsors and data users. The most regular is the General Household Survey
(GHS) which is conducted annually. The sampling frame for the GHS and other
surveys is based on the National Integrated Survey of Households (NISH1
).