Year	% (national estimate)
1960	23.301985370950888
1971	24.956304619225968
1978	23.780414718926043
1981	37.65640038498556
1986	48.40644919385076
1991	56.48260763804427
2001	71.13324089247448
2011	74.50462351387054
2014	80.48372271685896
2017	82.00397718200688
2018	78.79158647236734
2019	75.54631024616786
2020	74.56531732511289
2021	76.61311708794506
2022	73.8651917651331