Year | Value | 2014 | 279.91552309157 | 2013 | 257.38633605836 | 2012 | 252.74948266232 | 2011 | 262.06823231774 | 2010 | 267.58176713233 | 2009 | 271.38700967749 | 2008 | 273.89773735332 | 2007 | 260.41172995682 | 2006 | 252.20641176637 | 2005 | 191.37292476005 | 2004 | 197.5084546409 | 2003 | 171.6976902625 | 2002 | 159.35621096173 | 2001 | 169.81585468203 | 2000 | 180.16652183991 | 1999 | 182.39369512414 | 1998 | 177.37136751089 | 1997 | 180.47251520513 | 1996 | 170.4563368064 | 1995 | 164.77885005556 | 1994 | 172.23315185423 | 1993 | 196.76821225148 | 1992 | 194.58133846237 | 1991 | 198.17080030522 | 1990 | 205.15252149509 | 1989 | 216.69689722146 | 1988 | 215.90076111756 | 1987 | 213.53462581843 | 1986 | 214.28475368427 | 1985 | 229.79820800236 | 1984 | 210.02106520749 | 1983 | 218.59882051868 | 1982 | 224.05251870623 | 1981 | 199.68177769562 | 1980 | 157.98324180438 | 1979 | 157.33843059707 | 1978 | 157.86296720731 | 1977 | 156.85872133849 | 1976 | 167.41186002473 | 1975 | 176.14256435726 | 1974 | 170.8202583097 | 1973 | 154.17175333434 | 1972 | 156.84044627275 | 1971 | 153.75678061367 |
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