Year	% (national estimate)
1991	56.512
1992	53.631
1993	53.915
1994	53.105
1995	61.635
1996	58.53
1997	62.212
1998	68.508
1999	71.029
2000	77.417
2001	75.987
2002	68.271
2003	66.974
2004	70.077
2005	73.315
2006	74.163
2007	74.557
2008	73.527
2009	66.445
2010	65.334
2011	66.606
2012	68.403
2013	75.162
2014	73.573
2015	76.471
2016	78.166
2017	76.559
2018	76.416
2019	76.119
2020	68.645
2021	68.124
2022	74.734
2023	75.801