Year	% (national estimate)
1991	66.384
1992	66.498
1993	65.299
1994	61.481
1995	60.873
1996	63.338
1997	62.944
1998	63.337
1999	64.723
2000	65.001
2001	63.954
2002	65.395
2003	63.46
2004	61.888
2005	59.903
2006	63.333
2007	62.6
2008	62.421
2009	61.586
2010	62.514
2011	63.259
2012	61.954
2013	62.064
2014	62.065
2015	61.565
2016	62.488
2017	63.13
2018	62.587
2019	61.158
2020	59.418
2021	59.617
2022	60.142
2023	61.062