Year	% (national estimate)
1996	71.3
1997	69
1998	68.8
1999	68.7
2000	67.4
2001	67.3
2002	67.4
2003	66.7
2004	65.95
2007	69.169
2009	70.366
2010	70.803
2011	70.927
2012	71.08
2013	71.821
2014	71.891
2015	71.255
2016	70.732
2017	70.226
2018	69.725
2019	69.347
2020	66.195
2021	66.643
2022	68.142