Year	%
1985	56.31695
1986	56.60107
1987	58.45018
1988	58.03687
1989	56.28829
1990	59.43472
1991	63.69764
2003	99.07959
2004	99.5175
2005	99.54004
2006	100
2007	99.31557
2008	97.84895
2010	97.87168
2011	99.23771
2012	91.66523
2014	99.69122
2015	99.77986