Year | Value | 2021 | 614.64730517574 | 2020 | 698.24951793666 | 2019 | 1,010.3732089991 | 2018 | 1,142.7998478943 | 2017 | 1,138.7401637045 | 2016 | 988.53225355225 | 2015 | 1,050.1291529845 | 2014 | 1,375.3127619048 | 2013 | 1,409.0812095478 | 2012 | 1,344.7438251718 | 2011 | 1,183.5836843794 | 2010 | 998.56717073108 | 2009 | 844.76349175857 | 2008 | 952.33676326215 | 2007 | 697.99706555892 | 2006 | 691.22425657563 | 2005 | 492.50956874284 | 2004 | 382.88435713367 | 2003 | 323.64216807205 | 2002 | 293.4806999954 | 2001 | 298.4130470828 | 2000 | 260.71349707767 | 1999 | 264.6286177305 | 1998 | 268.39980365969 | 1997 | 345.29635540862 | 1996 | 289.92577442366 | 1995 | 313.46582766732 | 1994 | 317.79483565507 | 1993 | 282.43020938876 | 1992 | 265.06038746403 | 1991 | 282.56964460591 | 1990 | 263.28200835035 | 1989 | 325.37362540253 | 1988 | 311.30541968725 | 1987 | 184.17860157104 | 1986 | 128.35362489287 | 1985 | 231.34042205221 | 1984 | 298.85287586899 | 1983 | 384.92601167002 | 1982 | 503.18912686987 | 1981 | 521.35987463397 | 1980 | 465.40415985904 | 1979 | 409.35575981586 | 1978 | 377.98350850926 | 1977 | 334.82518950037 | 1976 | 353.92257157996 | 1975 | 362.34964391919 | 1974 | 410.99983694235 | 1973 | 271.6922792604 | 1972 | 283.20179599622 | 1971 | 260.39959710377 |
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