Year	% (national estimate)
1991	50.53703240627001
1992	55.35829541231184
1993	55.851503454901454
1995	56.57781834584101
1996	57.64195173353703
1997	58.57517398424433
1998	58.70860619796433
1999	59.67147335334976
2001	62.240004696745224
2002	63.178401956936625
2003	64.3842195246883
2004	64.62950905562063
2005	65.80967417223839
2006	65.59371917961562
2007	66.1550830188192
2008	65.97157184185873
2009	66.98679275217513
2011	65.82842232651069
2012	66.17721030620453
2013	66.08990845846145
2014	65.77308127393817
2015	66.3178086304827
2016	66.88063027271373
2017	67.49994426245722
2018	68.17824197638976
2019	69.036493673567
2020	67.45680688309795
2021	68.24878533156895
2022	69.03236280929688
2023	69.37276666536204