In the first census carried out by the Palestinian Central Bureau of Statistics (PCBS), in 1997, Jericho's population was 14,674. Palestinian refugees constituted a significant 43.6% of the residents or 6,393 people. The gender make-up of the city was 51% male and 49% female. Jericho has a young population, with nearly half (49.2%) of the inhabitants being under the age of 20. People between the ages of 20 and 44 made up 36.2% of the population, 10.7% between the ages of 45 and 64, and 3.6% were over the age of 64. In the 2007 census by the PCBS, Jericho had a population of 18,346.