Nigeria - Country profile
View country profile from World Statistics Pocketbook
http://data.un.org/

Nigeria - National Bureau of Statistics
National Statistical Office of Nigeria
http://www.nigerianstat.gov.ng/

Human Development Report (UNDP)
A reliable source and alternative perspective on critical issues for Human Development worldwide.
http://hdr.undp.org/

United Nations Statistics Division - National Accounts Estimates of Main Aggregates
National accounts estimates for most countries and areas from 1970 onwards.
http://unstats.un.org/