| Year | Value | | 2021 | 265,276 | | 2020 | 283,524 | | 2019 | 1,516,839 | | 2018 | 2,217,407 | | 2017 | 4,209,158 | | 2016 | 6,025,475 | | 2015 | 7,086,072 | | 2014 | 7,888,722.39936 | | 2013 | 6,866,780.59936 | | 2012 | 7,738,509.6454494 | | 2011 | 7,728,281.2539329 | | 2010 | 6,428,163 | | 2009 | 5,121,009 | | 2008 | 5,766,973 | | 2007 | 5,495,292 | | 2006 | 5,225,573 | | 2005 | 5,043,028 | | 2004 | 4,943,887 | | 2003 | 3,889,929 | | 2002 | 6,369,455 | | 2001 | 9,452,434 | | 2000 | 4,295,000 | | 1999 | 4,690,000 | | 1998 | 3,736,600 | | 1997 | 4,020,300 | | 1996 | 4,487,400 | | 1995 | 4,445,000 | | 1994 | 5,266,800 | | 1993 | 6,813,900 | | 1992 | 7,149,400 | | 1991 | 6,795,200 | | 1990 | 6,846,800 | | 1989 | 10,098,800 | | 1988 | 8,383,800 | | 1987 | 6,454,100 | | 1986 | 5,790,900 | | 1985 | 4,966,500 | | 1984 | 4,570,800 | | 1983 | 5,000,200 | | 1982 | 5,667,200 | | 1981 | 5,147,000 | | 1980 | 5,133,300 | | 1979 | 4,771,700 | | 1978 | 4,042,700 | | 1977 | 3,500,600 | | 1976 | 2,708,400 | | 1975 | 2,355,200 | | 1974 | 1,981,500 | | 1973 | 1,765,900 | | 1972 | 1,511,000 | | 1971 | 1,301,600 | | 1970 | 1,253,300 |
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