Year | Value | 2021 | 1,625.248 | 2020 | 4,248 | 2019 | 10,205 | 2018 | 9,385 | 2017 | 4,868 | 2016 | 8,745 | 2015 | 7,989 | 2014 | 7,728 | 2013 | 8,148 | 2012 | 10,555.228651565 | 2011 | 10,658.071293119 | 2010 | 10,363 | 2009 | 11,560 | 2008 | 12,236 | 2007 | 21,086 | 2006 | 19,862 | 2005 | 19,905 | 2004 | 16,612 | 2003 | 9,434 | 2002 | 8,735 | 2001 | 8,745 | 2000 | 13,010 | 1999 | 12,100 | 1998 | 14,800 | 1997 | 14,600 | 1996 | 7,400 | 1995 | 7,100 | 1994 | 6,800 | 1993 | 6,800 | 1992 | 6,800 | 1991 | 6,600 | 1990 | 6,700 | 1989 | 6,700 | 1988 | 6,700 | 1987 | 6,700 | 1986 | 6,100 | 1985 | 8,100 | 1984 | 7,600 | 1983 | 7,300 | 1982 | 4,800 | 1981 | 2,400 | 1980 | 1,600 | 1979 | 1,500 | 1978 | 1,500 | 1977 | 1,500 | 1976 | 1,500 |
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