Year	% (national estimate)
1974	81.48
1993	65
1994	75.9
1999	79.48
2001	73.43
2002	75
2003	73.5
2005	73.393
2006	71.38
2007	68.844
2008	70.027
2009	71.846
2010	71.407
2011	69.396
2012	67.686
2013	72.519
2014	73.176
2015	71.787
2016	70.651
2017	72.913
2018	74.648
2019	73.353
2020	65.244
2021	69.385
2022	73.353
2023	67.033