Year | Value | 2021 | 24,518 | 2020 | 13,594 | 2019 | 35,823 | 2018 | 54,653.302591099 | 2017 | 50,389 | 2016 | 41,022 | 2015 | 35,558 | 2014 | 28,979 | 2013 | 26,643 | 2012 | 26,469 | 2011 | 24,488 | 2010 | 21,668.31647358 | 2009 | 12,924 | 2008 | 12,431 | 2007 | 14,064 | 2006 | 12,785 | 2005 | 11,803 | 2004 | 10,832 | 2003 | 9,750 | 2002 | 9,989 | 2001 | 11,728 | 2000 | 12,589 | 1999 | 14,700 | 1998 | 21,700 | 1997 | 21,100 | 1996 | 21,600 | 1995 | 19,200 | 1994 | 18,700 | 1993 | 17,300 | 1992 | 16,900 | 1991 | 17,700 | 1990 | 18,300 | 1989 | 17,600 | 1988 | 18,400 | 1987 | 18,600 | 1986 | 16,700 | 1985 | 18,000 | 1984 | 16,200 | 1983 | 15,800 | 1982 | 16,400 | 1981 | 15,000 | 1980 | 15,000 | 1979 | 14,800 | 1978 | 14,500 | 1977 | 14,200 | 1976 | 13,200 | 1975 | 14,600 | 1974 | 13,800 | 1973 | 13,800 | 1972 | 12,500 | 1971 | 11,300 | 1970 | 10,700 |
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