Annual % 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