Year	% of total
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	3.571428571428571
1979	3.3333333333333335
1980	5
1981	4.651162790697674
1982	9.302325581395348
1983	8.928571428571429
1984	8.333333333333332
1985	6.349206349206349
1986	7.812500000000002
1987	10.294117647058824
1988	8.064516129032258
1989	6.849315068493151
1990	7.719999999999999
1991	6.377391304347826
1992	9.1675
1993	8.730952380952381
1994	8.730952380952381
1995	8.334090909090909
1996	8.334090909090909
1997	7.971739130434782
1998	7.971739130434782
1999	3.188695652173913
2000	2.8207692307692307
2001	5.238571428571428
2002	5.000454545454545
2003	4.314117647058823
2004	4.583749999999999
2005	4.583749999999999
2006	7.719999999999999
2007	5.79
2008	7.3340000000000005
2009	7.3340000000000005
2010	5.729687500000001
2011	2.973243243243243
2012	7.522051282051281
2013	5.366341463414634
2014	3.7610256410256406
2015	1.7887804878048779
2016	3.188695652173913