Namibia has a relatively young population; close to 40% of the whole population is younger than 15 years according to the National Population and Housing Census 2001. Adolescents in Namibia represent a large, significant, and growing number nationally. In 2005, the country had a Gross National Income per capita of US$ 2,990 with relatively good health and education indicators. However, there is unequal distribution of wealth among the different population groups. The San have the highest rate of illiteracy and are statistically the poorest language group. San children frequently drop out of school because of their economic position as well as their semi-nomadic lifestyle in search of food and water. The majority of San live in the regions of Omaheke and Otjozondjupa in the northeast of the country.