| Year | Value | | 2021 | 3,750,753 | | 2020 | 2,984,121.694 | | 2019 | 6,260,241 | | 2018 | 5,677,396 | | 2017 | 4,660,739.0383111 | | 2016 | 3,815,869 | | 2015 | 3,997,815 | | 2014 | 3,051,914.7332139 | | 2013 | 2,781,708 | | 2012 | 2,195,061.6802991 | | 2011 | 2,022,388.5722157 | | 2010 | 1,818,901.0188272 | | 2009 | 1,409,414 | | 2008 | 1,224,222 | | 2007 | 1,242,865 | | 2006 | 1,729,451 | | 2005 | 1,634,473 | | 2004 | 1,650,276 | | 2003 | 1,587,606 | | 2002 | 1,536,102 | | 2001 | 1,449,980 | | 2000 | 1,331,369 | | 1999 | 1,215,400 | | 1998 | 1,152,500 | | 1997 | 1,314,700 | | 1996 | 1,252,000 | | 1995 | 1,261,400 | | 1994 | 1,215,900 | | 1993 | 1,083,100 | | 1992 | 1,051,500 | | 1991 | 1,020,800 | | 1990 | 1,044,100 | | 1989 | 997,400 | | 1988 | 1,004,900 | | 1987 | 861,000 | | 1986 | 852,400 | | 1985 | 845,300 | | 1984 | 741,800 | | 1983 | 623,000 | | 1982 | 621,500 | | 1981 | 591,400 | | 1980 | 613,700 | | 1979 | 624,200 | | 1978 | 544,200 | | 1977 | 470,300 | | 1976 | 453,300 | | 1975 | 490,500 | | 1974 | 431,400 | | 1973 | 490,000 |
|