US economic engagement under the Haitian Hemispheric Opportunity through Partnership Encouragement (HOPE) Act, passed in December 2006, has boosted apparel exports and investment by providing duty-free access to the US. Congress voted in 2010 to extend the legislation until 2020 under the HELP Act; the apparel sector accounts for about 90% of Haitian exports and nearly one-tenth of GDP. Remittances are the primary source of foreign exchange, equaling nearly 20% of GDP and more than twice the earnings from exports. Haiti suffers from a lack of investment, partly because of limited infrastructure and a lack of security. In 2005, Haiti paid its arrears to the World Bank, paving the way for reengagement with the Bank. Haiti received debt forgiveness for over $1 billion through the Highly-Indebted Poor Country initiative in mid-2009. The remainder of its outstanding external debt was cancelled by donor countries following the 2010 earthquake but has since risen to over $600 million. The government relies on formal international economic assistance for fiscal sustainability, with over half of its annual budget coming from outside sources. The Michel Martelly administration in 2011 launched a campaign aimed at drawing foreign investment into Haiti as a means for sustainable development.