 A problem that goes hand in hand with poverty in Mexico is the level of schooling.In the 1960s, when Mexican narcotic smugglers started to smuggle drugs on a major scale, only 5.6% of the Mexican population had education beyond the six years of basic school.More recently, researchers from the World Economic Forum have noted that despite the Mexican economy being ranked 31st out of 134 economies for investment in education (5.3% of its GDP), as of 2009, the nation's primary education system is only ranked 116th, thereby suggesting "that the problem is not how much but rather how resources are invested".