Year	% (national estimate)
1997	33.267435283889505
1998	33.17279111626099
1999	30.572570866531567
2000	28.786328105903408
2001	27.797708546736576
2002	25.774976038860043
2003	24.76109944305758
2004	24.366532610695433
2005	24.0649249230104
2006	24.74076643617448
2007	25.99362769321564
2008	26.65876497229876
2009	25.207454781984023
2010	24.445812760651524
2011	23.33869053672396
2012	23.346830436916935
2013	23.197181484690457
2014	24.582894062663275
2015	25.528987202821128
2016	26.64168685522347
2017	28.094438894628826
2018	28.53333816370645
2019	28.656879778667964
2020	26.284670263271586
2021	25.02895249716222
2022	25.495650842234664
2023	25.392733751590395