The total fertility rate of the World is estimated at 2.43[10] (2017, world bank) children per woman, which is above the global average for the replacement fertility rate of approximately 2.33 (as of 2003),[11] meaning the world's population is growing. However, world population growth is unevenly distributed, with the total fertility rate ranging from one of the world's lowest 0.83 in Singapore, to highest 6.49 in Niger.[12] The United Nations estimated an annual population increase of 1.14% for the year of 2000.[13] The current world population growth is approximately 1.09%.[5] People under 18 years of age made up over a quarter of the world population (29.3%), and people age 65 and over made up less than one-tenth (7.9%) in 2011.[6]