Year	% of total
1960	95.91836734693877
1961	92.15686274509804
1962	97.10144927536231
1963	96.49122807017544
1964	98.8095238095238
1965	98.79518072289157
1966	97.33333333333333
1967	100
1968	99.42528735632183
1969	100
1970	100
1971	99.07407407407408
1972	100
1973	99.45945945945945
1974	99.47089947089947
1975	100
1976	99.40828402366864
1977	99.42857142857142
1978	99.4186046511628
1979	99.44444444444446
1980	100
1981	99.32432432432432
1982	99.27007299270072
1983	93.25153374233129
1984	89.47368421052632
1985	86.52849740932642
1986	84.86238532110092
1987	89.37007874015748
1988	87.1244635193133
1989	81.18466898954702
1990	109.0616379310345
1991	107.95648
1992	115.01045454545454
1993	109.51108843537416
1994	101.51033112582782
1995	107.4076129032258
1996	114.3375155279503
1997	115.8953086419753
1998	112.26346368715083
1999	95.67536363636364
2000	86.31786008230452
2001	84.61210116731517
2002	82.33187739463602
2003	84.00763636363637
2004	87.50494584837546
2005	82.50750000000001
2006	75.56242424242424
2007	69.56514705882353
2008	64.14608069164267
2009	67.22833333333332
2010	64.0222131147541
2011	66.28807692307691
2012	63.80383378016086
2013	62.78057591623036
2014	62.663924050632914
2015	63.80209595959596
2016	65.1709405940594