and its external debt surpassed 50% of GDP. Seeing the levels as excessive, the IMF advised the government to balance its budget by implementing austerity measures to sustain investor confidence. The De la Rúa administration implemented $1.4 billion in cuts in its first weeks in office in late 1999. In June 2000, with unemployment at 14% and projections of 3.5% GDP for the year, austerity was furthered by $938 million in spending cuts and $2 billion in tax increases. GDP growth projections proved to be overly optimistic (instead of growing, real GDP shrank 0.8%), and lagging tax receipts prompted the government to freeze spending and cut retirement benefits again. In early November, Standard & Poor's placed Argentina on a credit watch, and a treasury bill auction required paying 16% interest (up from 9% in July, the second-highest rate of any country in South America at the time. Rising bond yields forced the country to turn to major international lenders, such as the IMF, the World Bank, and the US Treasury, which would lend to the government below market rates if it complied with conditions. Several more rounds of belt-tightening followed. José Luis Machinea resigned in March 2001. He was replaced with Ricardo López Murphy, who lasted less than three weeks in office before being replaced with Cavallo. Standard and Poor's cut the credit rating of the country's bonds to B− in July 2001. Cavallo reacted by offering bondholders a swap: longer-term, higher-interest bonds would be exchanged for bonds due in 2010. The "megaswap" (megacanje), as Cavallo referred to it, was accepted by most bondholders, and it delayed up to $30 billion in payments that would have been due by 2005; but it also added $38 billion in interest payments in the out years; of the $82 billion in bonds that eventually had to be restructured (triggering a wave of holdout lawsuits), 60% were issued during the 2001 megaswap. Cavallo also attempted to curb the budget crisis by instituting an unpopular across-the-board pay cut in July of up to 13% to all civil servants and an equivalent cut to government pension benefits, De la Rúa's seventh austerity round—triggering nationwide strikes, and from August, it paid salaries of the highest-paid employees in IOUs instead of money. That further depressed the weakened economy, the unemployment rate rose to 16.4% in August 2001 up from a 14.7% a month earlier, and it reached 20%