| Year | Value | | 2021 | 4,732,700.188 | | 2020 | 4,901,769.069 | | 2019 | 7,629,985 | | 2018 | 7,387,754.8414897 | | 2017 | 6,919,854.67 | | 2016 | 6,431,560 | | 2015 | 5,872,686 | | 2014 | 5,436,093.351511 | | 2013 | 4,864,727.3179955 | | 2012 | 4,536,353.0008198 | | 2011 | 4,195,951.4631813 | | 2010 | 3,844,008.0266723 | | 2009 | 3,093,117 | | 2008 | 2,796,487 | | 2007 | 2,700,805 | | 2006 | 2,452,518 | | 2005 | 2,217,764 | | 2004 | 2,066,109 | | 2003 | 1,584,801 | | 2002 | 1,613,668 | | 2001 | 1,521,532 | | 2000 | 1,214,474 | | 1999 | 1,148,500 | | 1998 | 1,240,700 | | 1997 | 1,216,800 | | 1996 | 1,297,800 | | 1995 | 1,132,000 | | 1994 | 1,033,000 | | 1993 | 903,900 | | 1992 | 883,800 | | 1991 | 817,600 | | 1990 | 798,300 | | 1989 | 735,000 | | 1988 | 759,600 | | 1987 | 694,300 | | 1986 | 632,200 | | 1985 | 598,800 | | 1984 | 586,000 | | 1983 | 484,100 | | 1982 | 473,200 | | 1981 | 454,700 | | 1980 | 414,800 | | 1979 | 405,400 | | 1978 | 359,600 | | 1977 | 350,600 | | 1976 | 352,000 | | 1975 | 335,000 | | 1974 | 305,900 |
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