Year | Value | 2014 | 601.18973108879 | 2013 | 578.9026189278 | 2012 | 550.26599346689 | 2011 | 550.28693631484 | 2010 | 556.0430604122 | 2009 | 549.92110821353 | 2008 | 540.85728827941 | 2007 | 552.49614955594 | 2006 | 540.4390868918 | 2005 | 486.16450725702 | 2004 | 486.90643542856 | 2003 | 453.87421715759 | 2002 | 364.84819368039 | 2001 | 359.5987555137 | 2000 | 332.18976646714 | 1999 | 365.57081473578 | 1998 | 317.12219977612 | 1997 | 242.76159809988 | 1996 | 261.93557865271 | 1995 | 299.1216109677 | 1994 | 269.98695494765 | 1993 | 246.7668285325 | 1992 | 260.8953950915 | 1991 | 210.60978524471 | 1990 | 205.19076276931 | 1989 | 191.68759464433 | 1988 | 168.09997185493 | 1987 | 171.13822279796 | 1986 | 150.15568936452 | 1985 | 180.74503483876 | 1984 | 172.23254183289 | 1983 | 167.77028335356 | 1982 | 194.96994075723 | 1981 | 223.72484615735 | 1980 | 266.16950730776 | 1979 | 226.91487136084 | 1978 | 220.05757766897 | 1977 | 214.88719124196 | 1976 | 203.03085351268 | 1975 | 169.78867426361 | 1974 | 127.95489047929 | 1973 | 151.06343537711 | 1972 | 142.73836477042 | 1971 | 123.44435513116 |
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