Year	% (national estimate)
1989	51.13
1990	44.171
1991	42.917
1992	40.054
1993	41.629
1994	44.179
1995	39.653
1996	38.807
1997	37.234
1998	35.093
1999	31.049
2000	31.483
2001	33.287
2002	26.12
2003	30.062
2004	32.473
2005	31.075
2006	30.381
2007	32.096
2008	37.067
2009	34.095
2010	34.256
2011	36.494
2012	37.22
2013	38.189
2014	36.97
2015	37.81
2016	40.598
2017	42.175
2018	45.033
2019	42.669
2020	41.09
2021	40.02
2022	48.351
2023	46.28