Year	% (national estimate)
1989	43.476
1990	43.618
1992	44.897
1995	42.349
1996	40.318
1997	39.481
1998	37.954
1999	38.231
2001	39.278
2002	40.339
2003	39.39
2004	41.24
2005	41.544
2006	41.671
2007	42.273
2008	42.555
2009	40.964
2011	40.242
2012	38.978
2013	38.366
2014	38.172
2015	35.968
2016	33.251
2017	33.087
2018	33.527
2019	34.582
2020	28.784
2021	32.284
2022	37.706
2023	38.159