In 1994, following the assassination of the PRI's presidential candidate Luis Donaldo Colosio, Salinas was succeeded by substitute PRI candidate Ernesto Zedillo. Salinas left Zedillo's government to deal with the Mexican peso crisis, requiring a $50 billion IMF bailout. Major macroeconomic reforms were started by President Zedillo, and the economy rapidly recovered and growth peaked at almost 7% by the end of 1999.