Year	% (national estimate)
1975	76.0470242468773
1983	94.0849066899487
1987	93.44994417566058
1998	95.12287334593574
2004	98.87766554433222
2005	93.34680311797618
2011	87.66644558951073
2013	87.38279045755245
2017	87.77045055507169
2020	85.45152309646728