 This was a substantial increase over the 2006 total of 159,861 and 1991 total of 102,336.However, historical population numbers are likely to be a significant under-count of the true figure, and census results are disputed.There is a near-equal gender ratio (50.3% male) and a predominantly youthful population - 47.3% are younger than 15, whearas only 2.7% are aged 65 and over.