Year | Value | 2021 | 2,407.0506070283 | 2020 | 2,096.5341996081 | 2019 | 2,198.910451374 | 2018 | 2,135.6199837675 | 2017 | 2,127.093079369 | 2016 | 2,001.8967900168 | 2015 | 1,984.1046493744 | 2014 | 1,869.9747875365 | 2013 | 1,805.1239863236 | 2012 | 1,843.7550735143 | 2011 | 1,827.7099676253 | 2010 | 1,636.5238538373 | 2009 | 1,605.1761912014 | 2008 | 1,548.3206860695 | 2007 | 1,400.7294593158 | 2006 | 1,240.0800763729 | 2005 | 1,143.0421112176 | 2004 | 1,062.9588701874 | 2003 | 1,021.3350750335 | 2002 | 1,004.487965411 | 2001 | 1,008.328971543 | 2000 | 975.76725482517 | 1999 | 898.22374247818 | 1998 | 905.31323156698 | 1997 | 827.99265830057 | 1996 | 763.57529656617 | 1995 | 800.0246477099 | 1994 | 718.25411192463 | 1993 | 787.04584446169 | 1992 | 783.1174513191 | 1991 | 757.63262852774 | 1990 | 830.1712660193 | 1989 | 969.98806227995 | 1988 | 1,088.0971212432 | 1987 | 1,185.6551507221 | 1986 | 1,118.5549510463 | 1985 | 1,069.4132251234 | 1984 | 1,011.9568688846 | 1983 | 942.7635689417 | 1982 | 881.12514080181 | 1981 | 902.31175135475 | 1980 | 905.77236838653 | 1979 | 842.51069416443 | 1978 | 767.64460535081 | 1977 | 417.01383312821 | 1976 | 352.41667408162 | 1975 | 302.7179294234 | 1974 | 285.55373399558 | 1973 | 258.37522154064 | 1972 | 240.73158640773 | 1971 | 227.47954876048 |
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