Year	% (national estimate)
1994	29.38
1996	27.66
1997	30.75
1998	31.15
1999	31.55
2005	36.89
2012	41.79
2013	40.684
2014	40.83
2015	42.621
2016	43.73
2017	44.024
2019	49.418
2021	41.215