Year	% (national estimate)
1989	60.554
1990	59.753
1992	59.188
1995	56.43
1996	53.51
1997	52.849
1998	51.114
1999	50.61
2001	50.388
2002	51.192
2003	50.364
2004	51.991
2005	52.291
2006	52.108
2007	52.541
2008	52.918
2009	51.097
2011	49.633
2012	48.082
2013	47.213
2014	46.602
2015	44.295
2016	40.578
2017	40.088
2018	40.516
2019	41.638
2020	35.897
2021	39.313
2022	44.692
2023	44.673