Year	% (national estimate)
1961	63.17965023847377
1971	39.04078377762589
1981	51.534512264689106
1991	61.07281614237372
1996	88.43085106382979
1999	90.82640044370493
2003	102.39651416122004
2008	90.73417606091348
2013	90.53738317757009
2014	91.82027649769586
2015	92.46813441483198
2017	50.793390835971906