Year	%
2004	70.15025
2005	71.02073
2006	78.95352
2007	76.34161
2008	75.70329
2009	76.66411
2010	74.90149
2011	80.39745
2012	78.41024
2013	82.3353
2015	85.92435
2017	86.97538