Year	%
2004	74.3733
2005	76.60718
2006	78.38409
2007	73.15814
2008	73.9542
2009	76.77488
2010	74.7767
2011	79.82268
2012	75.31853
2013	80.03134
2015	86.60648
2017	88.17364