Year	%
1974	81.57742
1975	81.72563
1976	81.99693
1977	84.89981
1978	88.28842
1980	90.78674
1981	94.84491
1982	71.88182
1983	81.45953
2007	92.93049
2008	90.82964
2016	99.1262