Annual % of total
1960 90.56603773584905
1961 95.6521739130435
1962 92.06349206349206
1963 92.42424242424244
1964 93.9655172413793
1965 92.55319148936171
1966 90.9090909090909
1967 88.659793814433
1968 92.5925925925926
1969 94.06779661016948
1970 94.36619718309858
1971 91.33333333333334
1972 92.40506329113923
1973 93.02325581395348
1974 91.2568306010929
1975 86.47058823529412
1976 87.87878787878789
1977 88.51674641148325
1978 85.05154639175257
1979 86.89956331877728
1980 88.01843317972352
1981 91.18644067796609
1982 87.3362445414847
1983 85.64102564102564
1984 81.76100628930817
1985 84.17721518987342
1986 85.45454545454547
1987 90.76923076923077
1988 94.03973509933776
1989 88.3720930232558
1990 96.94945205479452
1991 79.87027397260273
1992 85.885
1993 87.51906666666667
1994 86.54119999999999
1995 87.815
1996 88.09743902439024
1997 86.1745
1998 86.03346153846154
1999 86.1745
2000 88.008
2001 89.97731481481482
2002 86.09478260869565
2003 87.60055555555556
2004 88.66102739726027
2005 80.215625
2006 83.77890510948905
2007 86.14539682539683
2008 85.9453125
2009 75.98628865979381
2010 97.99741379310345
2011 90.51873873873875
2012 95.76922330097088
2013 110.33451327433627
2014 118.40770992366411
2015 135.99470198675496
2016 111.27448275862068