Once Bolivia's government depended heavily on foreign assistance to finance development projects and to pay the public staff. At the end of 2002, the government owed $4.5 billion to its foreign creditors, with $1.6 billion of this amount owed to other governments and most of the balance owed to multilateral development banks. Most payments to other governments have been rescheduled on several occasions since 1987 through the Paris Club mechanism. External creditors have been willing to do this because the Bolivian government has generally achieved the monetary and fiscal targets set by IMF programs since 1987, though economic crises have undercut Bolivia's normally good record. However, by 2013 the foreign assistance is just a fraction of the government budget thanks to tax collection mainly from the profitable exports to Brazil and Argentina of natural gas.