Year	% (national estimate)
1990	53.34961199309561
1994	53.97972474519141
1997	55.17643912082372
2008	60.59377285818823
2009	58.584353747206734
2010	57.16381689144302
2011	57.17181076171359
2012	57.20872339753703
2013	57.04416974507832
2014	57.67954454732972
2015	56.64651072757379
2016	57.27130365214358
2019	57.163422324680404