fig.1 .HEA income and expenditure data by wealth group for the Northern Border Upland Cereal and Livestock Zone. Namibia for the reference year March 2006 - February 2007. (a)Income as food energy consumed and the proportion of the population in each wealth group. (b) Incomer in cash. (c) Expenditure. Crops include millet, sorghum, maize, beans and bambara nut; livestock are cattle, goats and chickens; employment is mainly in agriculture. Self employment includes construction, firewood and basket sales. Wild foods are mainly Marula fruit. A government old age pension is provided. source: Government of Namibia