, the National Institute of Statistics of Rwanda estimates Rwanda's population to be 11,262,564. The 2012 census recorded a population of 10,515,973. The population is young: in the 2012 census, 43.3% of the population were aged 15 and under, and 53.4% were between 16 and 64. According to the CIA ''World Factbook'', the annual birth rate is estimated at 40.2 births per 1,000 inhabitants in 2015, and the death rate at 14.9. The life expectancy is 67.67 years (69.27 years for females and 67.11 years for males), which is the 26th lowest out of 224 countries and territories. The overall sex ratio of the country is 95.9 males per 100 females.