Year	%
1986	81.45206
1987	84.76582
1999	89.73511
2000	88.40635
2001	90.96868
2002	93.20717
2010	92.39498
2013	91.19938
2014	90.64594
2015	91.14747
2016	90.36919
2017	91.5643