Year	% (national estimate)
1990	73.125
1991	71.14
1992	67.159
1993	63.098
1994	62.112
1995	59.129
1996	58.312
1997	58.274
1998	54.354
1999	51.831
2000	51.06
2001	50.588
2002	51.48
2003	52.314
2004	53.013
2005	54.02
2006	57.051
2007	57.773
2008	57.773
2009	52.493
2010	50.392
2011	53.747
2012	55.167
2013	56.033
2014	56.627
2015	58.139
2016	58.653
2017	59.889
2018	60.397
2019	60.706
2020	59.098
2021	59.753
2022	61.987
2023	62.219