Year	% (national estimate)
1992	36.453
1993	33.251
1994	31.303
1995	31.15
1996	32.008
1997	32.044
1998	31.105
1999	27.156
2000	26.408
2001	26.563
2002	24.449
2003	24.109
2004	23.812
2005	25.374
2006	26.916
2007	29.244
2008	30.954
2009	30.366
2010	30.479
2011	29.553
2012	29.25
2013	28.644
2014	29.959
2015	30.459
2016	32.849
2017	33.889
2018	34.71
2019	35.423
2020	32.342
2021	31.584
2022	31.937
2023	31.94