Year | Value | 2021 | 109,461.4 | 2020 | 186,314.332 | 2019 | 544,458 | 2018 | 541,290 | 2017 | 486,425 | 2016 | 441,861 | 2015 | 458,572 | 2014 | 520,421 | 2013 | 539,208 | 2012 | 588,169 | 2011 | 544,100.72727273 | 2010 | 524,296 | 2009 | 499,526 | 2008 | 558,981 | 2007 | 616,433 | 2006 | 572,991 | 2005 | 574,904 | 2004 | 513,508 | 2003 | 451,729 | 2002 | 266,033 | 2001 | 657,953 | 2000 | 629,409 | 1999 | 639,800 | 1998 | 600,500 | 1997 | 574,900 | 1996 | 542,100 | 1995 | 497,200 | 1994 | 450,700 | 1993 | 418,500 | 1992 | 343,900 | 1991 | 314,300 | 1990 | 424,200 | 1989 | 342,400 | 1988 | 387,000 | 1987 | 410,600 | 1986 | 355,900 | 1985 | 350,800 | 1984 | 360,000 | 1983 | 347,300 | 1982 | 410,200 | 1981 | 444,900 | 1980 | 447,700 | 1979 | 407,500 | 1978 | 335,800 | 1977 | 292,200 | 1976 | 262,000 | 1975 | 203,100 | 1974 | 230,700 | 1973 | 217,800 | 1972 | 201,100 | 1971 | 197,700 | 1970 | 168,000 |
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