Year	% (national estimate)
1989	79.92
1996	69.6
1997	66.2
1998	63.2
1999	60.2
2000	56.2
2001	60.8
2002	58.7
2003	57
2004	56.14
2007	55.917
2009	59.49
2010	58.134
2011	56.344
2012	55.039
2013	57.524
2014	57.584
2015	58.914
2016	56.612
2017	56.472
2018	55.141
2019	57.341
2020	52.833
2021	45.683
2022	44.044