Year | Value | 2014 | 15,249.98938023 | 2013 | 15,510.835503474 | 2012 | 15,689.223307624 | 2011 | 15,710.973759305 | 2010 | 16,484.094275371 | 2009 | 15,243.110387945 | 2008 | 16,349.233325034 | 2007 | 17,160.863119999 | 2006 | 17,215.037290164 | 2005 | 16,117.890332163 | 2004 | 16,777.565849019 | 2003 | 16,445.572561286 | 2002 | 16,140.066969222 | 2001 | 15,709.883253842 | 2000 | 15,305.409808607 | 1999 | 15,075.867190504 | 1998 | 14,846.420819412 | 1997 | 14,454.938728578 | 1996 | 13,721.923758331 | 1995 | 13,591.396670576 | 1994 | 13,603.276357896 | 1993 | 13,012.669430866 | 1992 | 12,514.10156938 | 1991 | 12,470.730432771 | 1990 | 12,485.683648285 | 1989 | 12,034.757273379 | 1988 | 11,778.272270732 | 1987 | 11,358.394752118 | 1986 | 10,622.888181216 | 1985 | 10,482.831606832 | 1984 | 9,808.4662572414 | 1983 | 9,124.1646307797 | 1982 | 8,533.1617405918 | 1981 | 8,493.6053687069 | 1980 | 8,295.7860963462 | 1979 | 7,930.6313737095 | 1978 | 7,330.4144657328 | 1977 | 6,726.6636870735 | 1976 | 6,545.7467987567 | 1975 | 5,946.3773283752 | 1974 | 6,140.1866807772 |
|