Year | Value | 2021 | 2,105 | 2020 | 64 | 2019 | 21,930.583128356 | 2018 | 23,206.966273393 | 2017 | 24,019 | 2016 | 40,928 | 2015 | 40,047 | 2014 | 46,404 | 2013 | 52,572 | 2012 | 33,606.039224431 | 2011 | 36,533.603996772 | 2010 | 39,865 | 2009 | 26,371 | 2008 | 28,356 | 2007 | 27,746 | 2006 | 26,175 | 2005 | 26,985 | 2004 | 25,700 | 2003 | 67,163 | 2002 | 63,361 | 2001 | 72,001 | 2000 | 62,070 | 1999 | 68,200 | 1998 | 70,100 | 1997 | 69,300 | 1996 | 77,700 | 1995 | 77,700 | 1994 | 74,000 | 1993 | 70,800 | 1992 | 68,200 | 1991 | 67,300 | 1990 | 58,000 | 1989 | 58,000 | 1988 | 61,700 | 1987 | 65,000 | 1986 | 65,000 | 1985 | 55,500 | 1984 | 45,900 | 1983 | 40,200 | 1982 | 35,800 | 1981 | 21,300 |
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