Year | Value | 2016 | 2.8858510728999 | 2015 | 0.74419899478147 | 2014 | 1.243038897608 | 2013 | 0.80822310148711 | 2012 | 9.7218280627336 | 2011 | 15.316515913949 | 2010 | 7.1000000000004 | 2009 | 2.7999999999998 | 2008 | 17.301384570016 | 2007 | 16.945100654195 | 2006 | 13.05269497451 | 2005 | 21.316816722934 | 2004 | 3.9943840081597 | 2003 | 12.873965718741 | 2002 | 31.52258260255 | 2001 | 359.93661426459 | 2000 | 513.90684374754 | 1999 | 284.89497591409 | 1998 | 29.148806923665 | 1997 | 198.51670741646 | 1996 | 492.44185023541 | 1995 | 541.90888323903 | 1994 | 23,773.131774102 | 1993 | 1,986.9047619048 | 1992 | 4,129.1698566156 | 1991 | 2,154.4368271134 | 1990 | 81.295404814004 | 1989 | 104.06522942826 | 1988 | 71.09173126615 | 1987 | 78.670360110803 | 1986 | 44.4 | 1985 | 23.820784521335 | 1984 | 52.227011357321 | 1983 | 76.526697666266 | 1982 | 36.699697574091 | 1981 | 35.408264874429 | 1980 | 46.625906830331 | 1979 | 101.0512604115 | 1978 | 48.76903761152 | 1977 | 68.947708199 | 1976 | 80.385959075414 | 1975 | 28.657970195227 | 1974 | 29.469281045994 | 1973 | 15.642762123819 | 1972 | 15.804215390795 | 1971 | 5.7773498259652 | 1970 | 8.0252840454849 | 1969 | 6.1761957352231 | 1968 | 53.321672710774 | 1967 | 36.926524872832 | 1966 | 15.780101249114 | 1965 | -2.7269802776292 | 1964 | 35.421064977788 |
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