Year	%
1980	98.50659
1981	98.97167
1982	99.62652
1983	99.8876
1984	99.31804
1985	99.84889
1986	99.6636
1987	100
1988	95.95133
1989	100
1992	100
1993	99.1763
2008	99.61152
2009	98.3641
2013	100
2014	99.76588
2015	99.20716
2016	99.94597