Year	% (national estimate)
1960	52.96
1970	50.27
1989	46
1991	60.847
1992	53.1
1998	65.81
1999	65.8
2000	54.559
2006	29.27
2010	45.592
2013	52.204
2015	40.903
2017	46.75
2022	37.352