Year	% (national estimate)
1981	51.73
1985	58.63
1991	35.67
1994	41.5
1996	31.941
1998	37.37
2000	36.34
2001	34.29
2006	37.344
2009	35.621
2010	34.69
2013	42.74
2019	31.595
2020	32.405
2021	35.942
2022	35.91
2023	38.721