Year | Value | 2021 | 0.105785 | 2020 | 2.883894 | 2019 | 0.183573 | 2017 | 2.792915531834 | 2016 | 3.996713403 | 2015 | 4.1257712301292 | 2014 | 4.0683511954608 | 2013 | 5.198784 | 2012 | 5.6720407386798 | 2011 | 7.56177 | 2010 | 1.21619 | 2009 | 1.857 | 2008 | 2.169 | 2007 | 2.09 | 2006 | 2.049 | 2005 | 2.112 | 2004 | 0.56 | 2003 | 1.937 | 2002 | 33.17 | 2001 | 51.86 | 2000 | 33.1 | 1999 | 68 | 1998 | 48 | 1997 | 82.5999984741 | 1996 | 116.5999984741 | 1995 | 99.8000030518 | 1994 | 213.8000030518 | 1993 | 153.1999969482 | 1992 | 174.3999938965 | 1991 | 132.1999969482 | 1990 | 112.5 | 1989 | 161.3999938965 | 1988 | 115.1999969482 | 1987 | 117.9000015259 | 1986 | 98.9000015259 | 1985 | 83.0999984741 | 1984 | 107.0999984741 | 1983 | 103.3000030518 | 1982 | 135.6000061035 | 1981 | 141.8999938965 | 1980 | 148.1000061035 | 1979 | 107.5 | 1978 | 110.4000015259 | 1977 | 115.5 | 1976 | 74.5999984741 | 1975 | 71.4000015259 | 1974 | 85.5999984741 | 1973 | 75.3000030518 | 1972 | 65.5 | 1971 | 66.3000030518 | 1970 | 58.5999984741 |
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