Year	% (national estimate)
1999	64.04335994133453
2001	60.9004539661847
2002	61.2776007876556
2003	59.181652666598794
2004	59.078257798439786
2005	58.48474797007881
2006	59.92963784749246
2007	59.96387074967681
2008	58.160686320587324
2009	56.699301770215264
2011	56.05477439030446
2012	55.75271548316005
2013	54.39745506100494
2014	54.042275749709844
2015	53.868986527561916
2016	51.53171437695915
2017	50.41574318325063
2018	50.383578353667936
2019	50.66677261760625
2020	44.20075379199084
2021	49.23468556185948
2022	51.37489533342395
2023	49.88348092229657