Year	Percent of People Ages 15 and Above
1975-01-01	8.68515014648438
1991-01-01	13.56923007965090
1996-01-01	12.84817028045650
2003-01-01	21.82291984558110
2005-01-01	23.55372047424320
2006-01-01	22.47257995605470
2007-01-01	28.72920989990230
2014-01-01	34.59939956665040