Year	% (national estimate)
1979	37.58
1989	34.49
1995	45.54
1998	51.02
1999	42.12
2001	39.31
2002	39.6
2003	38.55
2014	38.42
2015	36.29
2016	35.07
2017	34.39
2018	33.664
2019	36.225
2020	31.904
2021	30.639