Year | Value | 2021 | 1,020.6771937898 | 2020 | 982.69009298526 | 2019 | 981.35924521292 | 2018 | 923.27296222221 | 2017 | 955.70064012374 | 2016 | 884.2732916418 | 2015 | 856.43270273139 | 2014 | 878.92872176791 | 2013 | 823.66668905002 | 2012 | 764.75086387354 | 2011 | 724.84268894545 | 2010 | 636.85989275262 | 2009 | 592.49983390395 | 2008 | 546.07294917872 | 2007 | 463.07731356932 | 2006 | 407.6088163999 | 2005 | 369.2447977106 | 2004 | 333.23047411387 | 2003 | 298.36481420987 | 2002 | 278.18266502134 | 2001 | 265.71438705857 | 2000 | 283.0565793714 | 1999 | 256.88692471122 | 1998 | 251.49185169248 | 1997 | 249.89829886314 | 1996 | 242.87020785077 | 1995 | 215.36960718017 | 1994 | 192.55685192355 | 1993 | 219.84181723521 | 1992 | 227.26593185288 | 1991 | 259.29218957309 | 1990 | 256.98251803592 | 1989 | 246.46903216856 | 1988 | 241.83727541713 | 1987 | 230.79982607004 | 1986 | 218.1078657284 | 1985 | 212.15248726746 |
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