According to 2010 Tanzanian government statistics, the total fertility rate in Tanzania was 5.4 children born per woman, with 3.7 in urban mainland areas, 6.1 in rural mainland areas, and 5.1 in Zanzibar. For all women aged 45–49, 37.3 per cent had given birth to eight or more children, and for currently married women in that age group, 45.0 per cent had given birth to that many children.