Year | Value | 2021 | 332,174 | 2020 | 268,744 | 2019 | 598,374 | 2018 | 597,412 | 2017 | 599,256 | 2016 | 599,427 | 2015 | 607,168 | 2014 | 610,197 | 2013 | 641,440 | 2012 | 739,353.59975715 | 2011 | 754,292 | 2010 | 738,003.42644224 | 2009 | 771,675 | 2008 | 827,851 | 2007 | 825,471 | 2006 | 805,731 | 2005 | 728,081 | 2004 | 682,263 | 2003 | 695,865 | 2002 | 734,679 | 2001 | 777,756 | 2000 | 811,776 | 1999 | 748,600 | 1998 | 691,800 | 1997 | 667,500 | 1996 | 549,900 | 1995 | 482,000 | 1994 | 479,000 | 1993 | 459,800 | 1992 | 413,700 | 1991 | 408,000 | 1990 | 441,700 | 1989 | 393,200 | 1988 | 368,200 | 1987 | 314,400 | 1986 | 274,400 | 1985 | 261,200 | 1984 | 259,900 | 1983 | 241,000 | 1982 | 268,600 | 1981 | 254,400 | 1980 | 248,400 | 1979 | 262,400 | 1978 | 258,000 | 1977 | 256,300 | 1976 | 255,700 | 1975 | 246,300 | 1974 | 239,100 | 1973 | 230,600 | 1972 | 232,500 | 1971 | 211,600 | 1970 | 215,400 |
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