Year	% (national estimate)
1971	67.59592465485501
1981	74.15748364783866
1991	61.374678906505515
1994	62.22856147844563
2000	64.40434890862058
2001	53.59
2005	63.00294893669302
2010	54.11340889469415
2012	51.20163797342267
2018	44.591879177806696
2019	45.44279671756858
2020	43.02727349298382
2021	46.87819989007827
2022	44.475750397549255
2023	44.66454896245443