The countries of Central America, including Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama, have traditionally been dependent upon agricultural exports for a large portion of their economic activity. However, these countries have begun to diversify their economies towards manufacturing and tourism. Central American countries have sought to integrate their economies with world markets. Along these lines, the Dominican Republic-Central American Free Trade Agreement (DR-CAFTA), approved by the United States in late 2005, will likely boost the regions economic prospects and increase access to the regions largest export market. Meanwhile, three countries (El Salvador, Guatemala, and Honduras) have signed free trade agreements with Mexico, and there has also been progress on further trade liberalization with the Andean Community. With almost no domestic hydrocarbon reserves, all seven Central American countries rely heavily on imported oil for their energy needs. As a result, the countries have been hurt by high world oil prices in recent months. Partially offsetting this, many have been able to secure preferential pricing from Mexico and Venezuela . Besides oil, Central America has a large amount of installed hydroelectric capacity. Still, the region is nevertheless dependent upon imports for some three-fourths of its total energy consumption.