Year	% (national estimate)
1983	50.829
1984	51.247
1985	51.231
1986	51.748
1987	51.563
1988	52.289
1989	52.915
1990	55.197
1991	56.259
1992	55.008
1993	53.838
1994	53.083
1995	53.006
1996	52.524
1997	51.982
1998	52.035
1999	52.737
2000	52.909
2001	53.012
2002	52.414
2003	51.712
2004	50.771
2005	51.875
2006	53.116
2007	54.011
2008	54.912
2009	54.951
2010	55.149
2011	56.551
2012	56.848
2013	57.159
2014	57.426
2015	57.438
2016	58.523
2017	58.926
2018	59.19
2019	60.006
2020	58.207
2021	58.411
2022	59.341
2023	59.583