Year	Percent of People Ages 15 and Above
1988-01-01	26.8688507080078
2002-01-01	39.2752494812012
2006-01-01	41.8911514282227
2009-01-01	49.6951293945313
2011-01-01	52.0519599914551
2013-01-01	42.8175010681152