Year	%
1979	85.96559
1980	86.17967
1981	87.60639
1982	88.46863
1983	88.1361
1984	88.01072
2002	99.738
2003	99.81058
2004	99.78069
2005	99.89391
2006	100
2007	100
2008	100
2010	100
2011	100
2012	100
2013	100
2014	100
2015	100
2016	100
2017	100