Year	% (national estimate)
1999	42.5
2000	45.79
2001	45.03
2002	44.17
2003	46.19
2004	39.29
2005	41.75
2006	38.3
2007	36.1
2008	40.97
2009	48.764
2010	50.4
2011	53.107
2012	53.918
2013	53.917
2014	53.776
2015	52.251
2016	51.14
2017	50.126
2018	47.487
2019	45.682
2020	47.495