Year	% (national estimate)
1961	5.616104628798564
1975	14.094791953706256
1979	8.661212829502661
2000	18.608169440242058
2001	17.862595419847327
2002	19.158878504672895
2003	17.72151898734177
2005	18.167701863354036
2006	18.858954041204438
2007	22.826086956521735
2008	22.1875
2009	22.99382716049383
2010	23.149606299212596
2011	23.40764331210191
2012	23.00163132137031
2013	21.85430463576159
2014	21.105527638190953
2017	26.957728062762104
2018	23.82809949729059
2019	21.87484678618706
2020	23.838898719176637
2021	22.750259442897853
2022	22.716836524008524