The National Institute of Statistics (Spanish: Instituto Nacional de Estadística) is the official organisation in Spain that collects statistics about demography, economy, and Spanish society. Spain () or the Kingdom of Spain (Reino de España is a country located mostly in southwestern Europe on the Iberian Peninsula. Statistics is a mathematical science pertaining to the collection analysis interpretation or explanation and presentation of Data. Spain () or the Kingdom of Spain (Reino de España is a country located mostly in southwestern Europe on the Iberian Peninsula. Transition to a modern economy What is now the 8th largest economy in the world has evolved from the regulated economy of Francoism as the latter started to fade out in Every 10 years, this organisation conducts a national census. The last census took place in 2001. Year 2001 ( MMI) was a Common year starting on Monday according to the Gregorian calendar.