Year	% (national estimate)
1989	53.57770655655721
1992	52.10666195567802
1993	49.577487376679755
1994	48.803325261199504
1995	47.66014036955491
1996	46.51298866998253
1997	44.73957332610273
1998	44.930954238439526
1999	45.52341169773097
2000	44.72158939934749
2001	43.52074766202725
2002	43.45863254852931
2003	42.33567485748745
2004	42.58076673209885
2005	41.84594190113922
2006	41.77947215995137
2007	41.596769971343285
2008	42.48403830358093
2009	42.000775102256924
2010	41.65808457737682
2011	41.67330169237617
2012	40.98181404588592
2013	41.21432032418012
2014	40.81518587993918
2015	40.72445444469241
2016	40.4300101491817
2017	40.54836292833603
2018	40.430627070953165
2019	40.379841302373904
2020	38.19319137493516
2021	39.28253560178694
2022	40.34677184928145
2023	41.1099492671427