Year	% (national estimate)
1991	44.74
1994	46.69
1997	43
1998	43.5
1999	38.8
2000	37.6
2001	39.9
2002	35.62
2003	35.29
2005	33.347
2006	35.736
2007	35.981
2008	35.862
2009	34.979
2010	32.364
2011	32.18
2012	33.55
2013	33.676
2014	32.641
2015	33.118
2016	31.699
2017	33.053
2018	32.101
2019	32.192
2020	30.883
2021	28.111
2022	28.418