Year	% (national estimate)
1960	51.64413760956545
1970	47.449759624875995
1980	51.04397813912706
1990	52.9664007522535
1991	55.1811531186477
1992	57.833890309643365
1993	57.03192842848594
1995	56.88905024195909
1996	56.24413941680237
1997	57.30885474239966
1998	57.27094889626736
1999	57.42065947093388
2001	56.56003683578068
2002	57.41338726597235
2003	56.53120325511183
2004	56.16847957259387
2005	55.329997392197285
2006	55.68264645796263
2007	54.800693998222734
2008	53.99674322512809
2009	53.98503377591491
2011	51.8548542691524
2012	51.258637549774555
2013	50.66656695733309
2014	50.072654226707826
2015	50.4058210587554
2016	49.4127829811165
2017	49.39424088378691
2018	49.90922651394536
2019	50.292556005410326
2020	45.262133609518386
2021	49.383476089255346
2022	49.62563295961621
2023	48.43627338249077