Year	%
1972	81.53425
1974	91.85562
1975	77.68595
1976	69.03846
1977	88.63859
1979	95.84317
1980	98.8788
1982	99.11816
1983	86.2426
2002	93.43503
2003	98.07263
2004	97.45188
2005	98.85638
2006	98.32529
2007	99.44969
2008	98.94933
2009	100
2010	99.88525
2011	100
2012	99.46041
2013	99.97168
2014	98.73491
2016	99.45722
2017	99.58777