Year	% (national estimate)
1986	58.316
1987	59.026
1988	60.313
1989	60.356
1990	58.728
1991	58.379
1992	51.292
1993	46.845
1994	42.77
1995	40.053
1996	39.448
1997	43.122
1998	46.508
1999	46.615
2000	46.882
2001	48.1
2002	47.571
2003	43.05
2004	41.211
2005	39.623
2006	38.734
2007	38.524
2008	37.679
2009	32.465
2010	29.748
2011	28.658
2012	24.785
2013	22.909
2014	22.873
2015	24.092
2016	25.487
2017	27.601
2018	29.316
2019	30.447
2020	25.642
2021	25.422
2022	27.23
2023	29.454