In 2003 and 2004, the balance of payments improved due to rising oil prices and increased receipts from the services sector. As a result, the current account balance registered a surplus of US$219 million in 2003 and a surplus of US$442 million in 2004, compared to a deficit of US$35 million in 2002. Bahrain's gross international reserves increased substantially in 2004 to US$1.6 billion, up from US$1.4 billion in the previous three years (2001-2003). Though Current GDP per capita shrank by 2.4% in the 1980s, it bounced back to a growth of 36% in the 1990s as a result of successful diversification initiatives. Bahrain's urgency in embracing economic liberalisation is due to its need to diversify the economy away from its limited oil supplies. Unlike its Persian Gulf neighbours, Bahrain has little oil wealth and the economy has expanded into banking, heavy industries, retail and tourism. The Kingdom is the main banking hub for the Persian Gulf and a centre for Islamic finance, which has been attracted by the strong regulatory framework for the industry. According to the International Monetary Fund's Financial System Stability Assessment of Bahrain's financial regulatory environment, published on 6 March 2006, found:   In 2005, Bahrain signed the US-Bahrain Free Trade Agreement, becoming the first Persian Gulf state to sign such a bilateral trade agreement with the United States. A massive privatization programme is underway to sell off key government assets: utilities, banks, financial services, and telecommunications have started to come under the control of the private sector. As a result, the economy has been well positioned to exploit the extra revenues generated in the region thanks to the sustained high oil prices since 2002. In January 2006, the United Nations Economic and Social Commission for Western Asia cited Bahrain as the fastest growing economy in the Arab world. Between 1981 and 1993, Bahrain Government expenditures increased by 64%. During that same time, government revenues continued to be largely dependent on the oil industry and increased by only 4%. Bahrain has at times received significant budgetary support and project grants from Saudi Arabia, Kuwait and the United Arab Emirates. The government has used its modest oil revenues to build an advanced infrastructure in transportation and telecommunications. Bahrain is a regional financial and business center. Tourism, especially from the region, has proved another significant source of income. Bahrain has benefited from the oil boom since 2001, with economic growth of 5.5%. It has succeeded in attracting investment from other Persian Gulf states partly because it used the revenues of the 1970s-early 80s boom to invest in infrastructure development and other projects to improve the standard of living; health, education, housing, electricity, water, and roads all received attention.