Africa faces chronic power problems, including insufficient generation capacity, low connectivity, poor reliability and high costs, all of which constrain development. Power capacity additions in sub-Saharan Africa (excluding South Africa) since the 1990's were very small. Historically, investments in the power sector in Africa have come mostly from governments or public utilities (with foreign aid support). In recent years, these sources of funding have been flat. The fastest new sources of funding are from independent power producers and from China.