Namibia seeks to diversify its trading relationships which, for historical reasons, were tied to South African goods and services. The country is eligible for preferential trade benefits under the African Growth and Opportunity Act (AGOA), but has not taken advantage of AGOA since 2012. Namibia belongs to the Southern African Customs Union, which has signed a Trade, Investment, and Development Cooperative Agreement (TIDCA) with the U.S. The TIDCA establishes a forum for consultative discussions, cooperative work, and possible agreements on a wide range of trade issues. The main Namibian exports to the U.S. are uranium ore and diamonds. Mining and transportation equipment make up the majority of the U.S. exports to Namibia.