MILOSEVIC-era mismanagement of the economy, an extended period of economic sanctions, and the damage to Yugoslavia's infrastructure and industry during the NATO airstrikes in 1999 left the economy only half the size it was in 1990. After the ousting of former Federal Yugoslav President MILOSEVIC in September 2000, the Democratic Opposition of Serbia (DOS) coalition government implemented stabilization measures and embarked on a market reform program. After renewing its membership in the IMF in December 2000, a down-sized Yugoslavia continued to reintegrate into the international community by rejoining the World Bank (IBRD) and the European Bank for Reconstruction and Development (EBRD). A World Bank-European Commission sponsored Donors' Conference held in June 2001 raised $1.3 billion for economic restructuring. In November 2001, the Paris Club agreed to reschedule the country's $4.5 billion public debt and wrote off 66% of the debt. In July 2004, the London Club of private creditors forgave $1.7 billion of debt just over half the total owed. Belgrade has made only minimal progress in restructuring and privatizing its holdings in major sectors of the economy, including energy and telecommunications. It has made halting progress towards EU membership and is currently pursuing a Stabilization and Association Agreement with Brussels. Serbia is also pursuing membership in the World Trade Organization. Unemployment remains an ongoing political and economic problem.