Year | Value | 2021 | 672,219 | 2020 | 299,469 | 2019 | 18,456.645046621 | 2018 | 17,896.921165363 | 2017 | 17,564 | 2016 | 18,117 | 2015 | 17,902 | 2014 | 475,932 | 2013 | 475,932 | 2012 | 907,927.74176397 | 2011 | 1,433,766.6947323 | 2010 | 1,158,366 | 2009 | 1,342,518 | 2008 | 1,358,473 | 2007 | 1,371,450 | 2006 | 1,252,102 | 2005 | 1,239,825 | 2004 | 1,169,646 | 2003 | 907,850 | 2002 | 926,850 | 2001 | 760,923 | 2000 | 750,129 | 1999 | 668,400 | 1998 | 685,400 | 1997 | 694,200 | 1996 | 598,500 | 1995 | 563,100 | 1994 | 472,100 | 1993 | 485,000 | 1992 | 551,900 | 1991 | 661,200 | 1990 | 613,300 | 1989 | 456,200 | 1988 | 341,600 | 1987 | 390,600 | 1986 | 458,600 | 1985 | 475,800 | 1984 | 464,400 | 1983 | 486,600 | 1982 | 466,400 | 1981 | 515,500 | 1980 | 465,000 | 1979 | 433,200 | 1978 | 494,700 | 1977 | 410,600 | 1976 | 448,200 | 1975 | 370,700 | 1974 | 284,300 | 1973 | 184,700 | 1972 | 235,700 | 1971 | 145,300 | 1970 | 139,000 |
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