| Year | Value | | 2021 | 7,303,348.38 | | 2020 | 6,567,899.014 | | 2019 | 11,156,939.272 | | 2018 | 10,693,202.070591 | | 2017 | 10,149,322.67 | | 2016 | 9,501,394 | | 2015 | 9,025,937 | | 2014 | 8,471,671.0273813 | | 2013 | 7,908,184.5827569 | | 2012 | 7,381,815.7607027 | | 2011 | 6,944,807.8745297 | | 2010 | 6,378,364.1801684 | | 2009 | 5,504,592 | | 2008 | 4,927,058 | | 2007 | 4,686,224 | | 2006 | 4,169,909 | | 2005 | 3,816,401 | | 2004 | 3,665,061 | | 2003 | 3,218,826 | | 2002 | 3,283,798 | | 2001 | 3,197,261 | | 2000 | 2,828,120 | | 1999 | 2,853,000.0009766 | | 1998 | 2,732,000 | | 1997 | 2,735,700 | | 1996 | 2,622,800 | | 1995 | 2,582,100 | | 1994 | 2,479,800 | | 1993 | 2,465,000 | | 1992 | 1,469,600 | | 1991 | 1,424,700 | | 1990 | 1,377,800 | | 1989 | 1,287,600 | | 1988 | 1,268,600 | | 1987 | 1,170,500 | | 1986 | 1,115,500 | | 1985 | 1,063,300 | | 1984 | 1,045,600 | | 1983 | 961,300 | | 1982 | 900,600 | | 1981 | 810,300 | | 1980 | 823,400 | | 1979 | 790,300 | | 1978 | 706,900 | | 1977 | 700,700 | | 1976 | 713,800 | | 1975 | 691,200 | | 1974 | 672,000 |
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