As of the calculations of 2004, there are 34,216,164 Africans and 8,625,050 African households residing in South Africa. The African population density is 29/km². The density of African households is 7/km². Africans make up 79.0% of the total population. The percentage of all African households that are made up of individuals is 19.9%. The average African household size is 4.11 members. In South Africa, the African population is spread out with 34.0% under the age of 15, 21.6% from 15 to 24, 28.3% from 25 to 44, 11.8% from 45 to 64, and 4.3% who are 65 years of age or older. The median age of an African is 21 years. For every 100 African females there are 91.1 African males. For every 100 African females age 18 and over, there are 86.2 African males. With regard to education, 22.3% of Africans aged 20 and over have received no schooling, 18.5% have had some primary, 6.9% have completed only primary school, 30.4% have had some high education, 16.8% have finished only high school, and 5.2% have an education higher than the high school level. Overall, 22.0% of Africans have completed high school, and 59% of Africans, aged 25 to 64, have an upper secondary education as their highest level of education. This places South Africa above the G20 average of 32% and the OECD average of 38%. The percentage of African housing units having a telephone and/or mobile phone in the dwelling is 31.1%. The percentage having access to a nearby phone is 57.2%, and 11.7% do not have nearby access or any access. The percentage of African households that have a flush or chemical toilet is 41.9%. Refuse is removed from 45.3% of African households by the municipality at least once a week, and 11.0% have no rubbish disposal. Some 17.9% of Africans have running water inside their dwelling, 51.7% have running water on their property, and 80.2% have access to running water. The percentage of African households using electricity for cooking is 39.3%, for heating, 37.2%, and for lighting, 62.0%. Radios are owned by 68.7% of African households while 44.2% have a television, 1.8% own a computer, 40.0% have a refrigerator, and 24.6% have a mobile phone.