Year	% (national estimate)
1992	38.78134247320425
1993	35.67155301529357
1994	34.86285296121177
1995	33.68186697278632
1996	32.80296607358315
1997	31.478252944206208
1998	31.324672016290876
1999	32.40864165566741
2000	32.31693187497846
2001	32.064249556467466
2002	32.13362408775534
2003	31.11446330841478
2004	30.617022264842067
2005	30.264962519251334
2006	30.445028341657654
2007	31.009870293375812
2008	31.36203496387819
2009	30.081080741459452
2010	29.447896254842327
2011	29.509689915641946
2012	28.663614038303976
2013	28.812151088532985
2014	28.7093642406759
2015	29.291792603439074
2016	29.58913301330653
2017	29.833815174242364
2018	29.94300893658265
2019	30.216927735325662
2020	27.557840355727595
2021	29.114453255085415
2022	30.802757161218857
2023	31.683969216061225