Year | Value | 2021 | 651,031.206 | 2020 | 531,824.1644 | 2019 | 1,044,585.09 | 2018 | 1,079,117.9291659 | 2017 | 1,024,815 | 2016 | 945,477 | 2015 | 924,520 | 2014 | 906,647.60399013 | 2013 | 875,902.21523862 | 2012 | 806,865.39734177 | 2011 | 815,008.05959347 | 2010 | 731,228.90648575 | 2009 | 489,833 | 2008 | 475,322 | 2007 | 516,809 | 2006 | 474,783 | 2005 | 456,226 | 2004 | 446,038 | 2003 | 404,867 | 2002 | 409,497 | 2001 | 476,764 | 2000 | 485,785 | 1999 | 486,700 | 1998 | 523,500 | 1997 | 512,100 | 1996 | 445,300 | 1995 | 434,100 | 1994 | 470,600 | 1993 | 418,200 | 1992 | 460,700 | 1991 | 469,600 | 1990 | 483,300 | 1989 | 484,700 | 1988 | 487,200 | 1987 | 465,200 | 1986 | 457,900 | 1985 | 465,600 | 1984 | 458,800 | 1983 | 416,600 | 1982 | 409,300 | 1981 | 425,400 | 1980 | 424,100 | 1979 | 389,300 | 1978 | 371,000 | 1977 | 353,800 | 1976 | 380,300 | 1975 | 350,300 | 1974 | 297,400 | 1973 | 313,100 | 1972 | 277,400 | 1971 | 294,600 | 1970 | 298,600 |
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