Year	% (national estimate)
1992	49.598112365623464
1995	44.920820898910705
1996	43.23726765759575
1997	40.3013694870085
1998	40.820578107364824
1999	39.626408921506545
2000	39.102584961471045
2001	39.09412302002601
2002	37.108678747089584
2003	35.223428447120284
2004	34.64182884981954
2005	33.35073150557341
2006	32.570396367082395
2007	31.98190774182822
2008	31.9789480478982
2009	32.12732129030442
2010	32.37379135952451
2011	31.36886133571104
2012	31.633771219368953
2013	31.598909513532757
2014	32.12432785159083
2015	32.189299350536835
2016	32.372326705022154
2017	33.05397486358584
2018	32.6498406009737
2019	32.40568844963025
2020	30.444260636693638
2021	29.361547877161055
2022	29.495827797379647
2023	29.477129401041882