Israel has a technologically advanced market economy with substantial government participation. It depends on imports of crude oil, grains, raw materials, and military equipment. Despite limited natural resources, Israel has intensively developed its agricultural and industrial sectors over the past 20 years. Israel imports substantial quantities of grain but is largely self-sufficient in other agricultural products. Cut diamonds, high-technology equipment, and agricultural products (fruits and vegetables) are the leading exports. Israel usually posts sizable current account deficits, which are covered by large transfer payments from abroad and by foreign loans. Roughly half of the government's external debt is owed to the US, which is its major source of economic and military aid. The bitter Israeli-Palestinian conflict; difficulties in the high-technology, construction, and tourist sectors; and fiscal austerity in the face of growing inflation led to small declines in GDP in 2001 and 2002. The economy grew at 1% in 2003, with improvements in tourism and foreign direct investment. In 2004, rising business and consumer confidence - as well as higher demand for Israeli exports - are forecast to boost GDP by 2.5%.