| Year | Value | | 2021 | 440,301,216 | | 2020 | 417,255,845 | | 2019 | 659,629,070 | | 2018 | 611,439,830 | | 2017 | 551,234,509 | | 2016 | 487,960,477 | | 2015 | 436,183,969 | | 2014 | 390,878,784 | | 2013 | 352,795,296 | | 2012 | 318,475,924 | | 2011 | 292,160,158 | | 2010 | 266,293,020 | | 2009 | 229,062,099 | | 2008 | 191,001,220 | | 2007 | 183,613,132 | | 2006 | 158,013,351 | | 2005 | 136,721,623 | | 2004 | 119,789,024 | | 2003 | 86,040,642 | | 2002 | 83,671,798 | | 2001 | 72,660,653 | | 2000 | 61,891,807 | | 1999 | 55,853,100 | | 1998 | 53,234,000 | | 1997 | 52,277,000 | | 1996 | 51,770,100 | | 1995 | 47,564,500 | | 1994 | 37,601,000 | | 1993 | 31,312,500 | | 1992 | 27,345,000 | | 1991 | 19,520,000 | | 1990 | 16,596,100 | | 1989 | 11,080,000 | | 1988 | 17,000,000 | | 1987 | 12,500,000 | | 1986 | 10,000,000 | | 1985 | 7,300,000 | | 1984 | 5,000,000 | | 1983 | 3,836,000 | | 1982 | 3,942,000 | | 1981 | 3,236,000 | | 1980 | 2,568,000 | | 1979 | 2,519,000 | | 1978 | 1,540,000 | | 1977 | 1,110,000 | | 1976 | 1,050,000 | | 1975 | 1,000,000 | | 1974 | 710,000 |
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