Year	% (national estimate)
1976	59.16390829961996
1980	70.77938891765925
1982	57.909909909909906
1985	61.17878676018211
1987	62.46654313362158
1996	80.92105263157895
2001	85.73298429319371
2005	91.31016042780749
2007	91.40726367345029
2010	85.85662211421628
2014	86.69840778302496
2021	77.4542328717446