Year	% (national estimate)
1990	48.637
1991	50.861
1992	50.449
1993	55.704
1994	58.825
1995	59.309
1996	57.956
1997	56.026
1998	52.716
1999	51.606
2000	51.185
2001	49.14
2002	44.513
2003	42.905
2004	45.148
2005	47.883
2006	48.189
2007	49.347
2008	50.266
2009	45.902
2010	46.327
2011	46.324
2012	48.637
2013	49.791
2014	49.728
2015	49.463
2016	48.919
2017	49.315
2018	47.474
2019	46.257
2020	41.807
2021	42.464
2022	44.138