Year	% of total
1960	91.20879120879121
1961	90.36144578313252
1962	79.20792079207921
1963	84.5360824742268
1964	78.49462365591397
1965	97.8021978021978
1966	58.95522388059702
1967	66.66666666666666
1968	66.66666666666667
1969	66.1654135338346
1970	4.734256364448415
1971	4.829268292682927
1972	7.790697674418605
1973	8.633357825128583
1974	16.71146953405018
1975	21.439668565510097
1976	16.9811320754717
1977	27.981651376146793
1978	37.77863182167563
1979	46.72252341054707
1980	42.194992008524245
1981	80.54862842892769
1982	56.21716287215411
1983	48.50948509485095
1984	57.17017208413002
1985	47.59887005649718
1986	40.98883572567784
1987	62.65193370165745
1988	71.13534316869789
1989	74.40785673021374
1990	117.21303571428572
1991	73.01452662721893
1992	78.1408077994429
1993	71.63441860465116
1994	63.50818840579711
1995	60.79071111111111
1996	60.02668789808917
1997	57.63457760314342
1998	70.7875638051044
1999	39.82064439140811
2000	68.78729119638827
2001	67.46939675174013
2002	65.43408256880734
2003	55.319314285714285
2004	65.96128048780487
2005	68.16663900414937
2006	44.89789473684211
2007	86.90361111111112
2008	89.99894736842106
2009	75.412866756393
2010	89.37644314868804
2011	104.04654778887303
2012	99.87817671809258
2013	80.18297720797722
2014	97.22548063127691
2015	81.8636287625418
2016	83.3513104524181