Year	%
1998	88.09717
1999	89.7153
2003	93.71267
2006	97.60241
2008	95.9914
2009	88.80615
2010	91.80819
2011	90.7775
2012	92.63052
2013	95.56447
2014	92.99217
2015	90.15751
2016	90.974
2017	91.57744