Year	% of total
1960	0.16706290560945833
1961	0.21891109384930443
1962	0.6980684513724162
1963	0.8025053826580544
1964	0.9393625291526302
1965	0.9350304638957592
1966	0.8294753086419754
1967	0.9081791843102295
1968	1.49729035141628
1969	1.1745323129251701
1970	1.2393645797472088
1971	0.7912783541410234
1972	0.8731321418107236
1973	1.4778053487730907
1974	0.9370881936648933
1975	1.0515428374418205
1976	0.9400179051029544
1977	1.680092059838895
1978	0.5445227418321588
1979	0.7854029979407118
1980	0.8076892011953799
1981	0.29505582137161085
1982	0.4082914572864322
1983	0.539603765410217
1984	0.6805397112623421
1985	0.3222419348998877
1986	0.3080116508754896
1987	0.3601519907483892
1988	0.5716993051168666
1989	0.943237325248442
1990	1.1806089992242048
1991	1.1138167789823223
1992	1.1762405727923628
1993	0.9122553114218269
1994	0.6913223964470225
1995	0.01567898067384984
1996	0.044914644415524764
1997	0.09172220996100934
1998	2.656444310292786
1999	0.10355506746156261
2000	0.3547213334325471
2001	0.1282074440964382
2002	0.04534001923341118
2003	0.11417885590152065
2004	0
2005	0.08610712699117852
2006	0.10519781172860097
2007	0.2640201597067679
2008	0.3140130894855955
2009	0.5256786433233698
2010	0.4407246207701284
2011	0.45681278646139384
2012	0.4346251291252106
2013	0.42398710571185
2014	0.3971691000796389
2015	0.2973585231193927
2016	0.28963100086387755