Year | Value | 2014 | 220.39285535548 | 2013 | 189.77919392176 | 2012 | 159.72301667215 | 2011 | 158.08967902132 | 2010 | 127.35116778794 | 2009 | 101.86503806647 | 2008 | 96.471364380901 | 2007 | 91.628459415559 | 2006 | 90.562618238284 | 2005 | 76.774030664478 | 2004 | 82.596712194566 | 2003 | 82.02574304103 | 2002 | 74.956599827497 | 2001 | 70.1730350996 | 2000 | 77.209679089695 | 1999 | 69.8242843577 | 1998 | 66.470206285646 | 1997 | 66.019215935506 | 1996 | 59.000488884223 | 1995 | 58.53519385387 | 1994 | 55.317900898713 | 1993 | 52.000198524458 | 1992 | 45.467978624376 | 1991 | 42.084011042825 | 1990 | 45.461853402705 | 1989 | 41.479465676616 | 1988 | 38.669073771485 | 1987 | 43.54857199786 | 1986 | 43.276516714157 | 1985 | 43.247177003239 | 1984 | 36.311003384473 | 1983 | 33.649254287923 | 1982 | 33.158153512234 | 1981 | 31.222425687549 | 1980 | 34.722034426748 | 1979 | 33.514332053726 | 1978 | 31.691190107029 | 1977 | 30.169929593145 | 1976 | 27.762179282595 | 1975 | 25.507281834637 | 1974 | 22.586765446121 | 1973 | 22.835311867957 | 1972 | 21.189446646882 | 1971 | 19.810171272722 |
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