Year	% (national estimate)
1991	57.5
1992	58.95
1995	60.42
1998	64.17
1999	67.43
2001	61.55
2002	57.8
2003	57.6
2004	58.34
2005	58.64
2006	57.716
2007	57.065
2008	57.696
2009	58.806
2010	59.364
2011	57.054
2012	56.208
2013	59.123
2014	59.612
2015	60.152
2016	59.063
2017	60.802
2018	62.994
2019	61.006
2020	53.849
2021	57.644
2022	59.417
2023	54.051