| Year | Value | | 2014 | -357.39437917615 | | 2013 | -458.37254343791 | | 2012 | -383.54231254664 | | 2011 | -382.70480533246 | | 2010 | -473.19072663497 | | 2009 | -522.42863988043 | | 2008 | -495.88002834021 | | 2007 | -542.86674417365 | | 2006 | -608.13673778471 | | 2005 | -849.55521188867 | | 2004 | -803.43595839266 | | 2003 | -746.20159804546 | | 2002 | -839.3335731297 | | 2001 | -799.19678296471 | | 2000 | -725.5084281608 | | 1999 | -683.45277425034 | | 1998 | -629.18750849005 | | 1997 | -651.1494779342 | | 1996 | -681.18746529534 | | 1995 | -711.7893373624 | | 1994 | -839.36030611119 | | 1993 | -749.62579808879 | | 1992 | -734.42398091129 | | 1991 | -737.90377632032 | | 1990 | -805.78943162498 | | 1989 | -885.82843937677 | | 1988 | -1,034.6290012061 | | 1987 | -867.33715813 | | 1986 | -899.09586154773 | | 1985 | -801.30582788747 | | 1984 | -864.83339469267 | | 1983 | -1,065.9636625336 | | 1982 | -1,115.3207866423 | | 1981 | -1,186.7740135819 | | 1980 | -1,466.0209856218 | | 1979 | -1,881.1465976189 | | 1978 | -1,817.6955425068 | | 1977 | -1,688.6529237755 | | 1976 | -1,709.4787996996 | | 1975 | -1,827.1556713549 | | 1974 | -2,190.0674597027 | | 1973 | -3,719.783480283 | | 1972 | -5,228.087044246 | | 1971 | -3,651.9178151744 |
|