Year | Value | 2021 | 161.70515931898 | 2020 | 139.88858451077 | 2019 | 138.50047793258 | 2018 | 140.49830498361 | 2017 | 142.57428330514 | 2016 | 140.79918729551 | 2015 | 146.11030742859 | 2014 | 140.76777450462 | 2013 | 140.15598356589 | 2012 | 144.72358382594 | 2011 | 145.28601881129 | 2010 | 147.17703293835 | 2009 | 151.59340655124 | 2008 | 143.79894970123 | 2007 | 142.84228445393 | 2006 | 136.72183885569 | 2005 | 139.99195573566 | 2004 | 135.35424927467 | 2003 | 134.21075270948 | 2002 | 139.027200347 | 2001 | 133.99582094554 | 2000 | 129.43967429989 | 1999 | 127.51519995433 | 1998 | 136.65247704701 | 1997 | 129.5868417846 | 1996 | 135.40291740998 | 1995 | 135.40826128722 | 1994 | 128.49347606719 | 1993 | 127.65534512443 | 1992 | 125.34688749039 | 1991 | 137.65547336242 | 1990 | 131.22536627796 | 1989 | 137.70239473979 | 1988 | 144.01262608055 | 1987 | 133.67884976465 | 1986 | 144.16345654326 | 1985 | 142.10214191028 | 1984 | 136.32377648168 | 1983 | 150.51288503382 | 1982 | 137.03691598712 | 1981 | 141.86991119399 | 1980 | 137.65634019627 | 1979 | 143.72495877034 | 1978 | 139.08308666621 | 1977 | 123.31121353563 | 1976 | 129.69469624229 | 1975 | 129.48827918927 |
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