Year	% (national estimate)
1994	30.697
1995	31.053
1996	33.11
1997	32.745
1998	32.127
1999	29.018
2000	28.18
2001	26.551
2002	25.293
2003	25.41
2004	24.61
2005	22.992
2006	22.354
2007	24.095
2008	21.447
2009	18.623
2010	17.316
2011	15.024
2012	15.949
2013	16.22
2014	17.936
2015	18.024
2016	18.208
2017	21.132
2018	20.555
2019	17.838
2020	16.539
2021	15.543
2022	15.785
2023	17.782