Year	% (national estimate)
1993	65.6
1994	67.87
1996	57.8
1998	64.068
1999	62.21
2001	63.946
2002	62.291
2003	62.992
2004	66.724
2005	66.888
2006	63.509
2007	65.572
2008	66.243
2009	65.821
2010	64.643
2011	64.745
2012	68.365
2013	66.803
2014	64.535
2015	64.832
2016	66.29
2017	66.679
2018	67.4
2019	67.618
2020	64.824
2021	66.661
2022	65.813
2023	66.652