Guatemala is the largest and most populous of the Central American countries with a GDP per capita roughly one-half that of Brazil, Argentina, and Chile. The agricultural sector accounts for about one-fourth of GDP, two-thirds of exports, and half of the labor force. Coffee, sugar, and bananas are the main products. The 1996 signing of peace accords, which ended 36 years of civil war, removed a major obstacle to foreign investment, but widespread political violence and corruption scandals continue to dampen investor confidence. The distribution of income remains highly unequal, with perhaps 75% of the population below the poverty line. Ongoing challenges include increasing government revenues, negotiating further assistance from international donors, upgrading both government and private financial operations, curtailing drug trafficking, and narrowing the trade deficit.