The hardest-hit sectors in the worst recession years (2002–2003) were construction (−55.9%), petroleum (−26.5%), commerce (−23.6%) and manufacturing (−22.5%). The drop in the petroleum sector was caused by adherence to the OPEC quota established in 2002 and the virtual cessation of exports during the PdVSA-led general strike of 2002–2003. The non-petroleum sector of the economy contracted by 6.5% in 2002. The bolívar, which had been suffering from serious inflation and devaluation relative to international standards since the late 1980s, continued to weaken.