Year | Value | 2021 | 425,094.064 | 2020 | 354,727.9354 | 2019 | 664,891.3 | 2018 | 710,450.71801985 | 2017 | 683,401 | 2016 | 598,997 | 2015 | 577,707 | 2014 | 592,719.15104079 | 2013 | 537,330.21523862 | 2012 | 474,712.15025616 | 2011 | 482,532.68656346 | 2010 | 423,255.57285286 | 2009 | 271,231 | 2008 | 254,859 | 2007 | 286,183 | 2006 | 250,482 | 2005 | 250,009 | 2004 | 251,709 | 2003 | 217,640 | 2002 | 214,168 | 2001 | 223,542 | 2000 | 226,175 | 1999 | 224,800 | 1998 | 248,900 | 1997 | 236,100 | 1996 | 256,800 | 1995 | 241,900 | 1994 | 246,900 | 1993 | 243,600 | 1992 | 255,800 | 1991 | 265,700 | 1990 | 272,700 | 1989 | 268,100 | 1988 | 274,800 | 1987 | 265,400 | 1986 | 262,200 | 1985 | 267,000 | 1984 | 272,500 | 1983 | 269,100 | 1982 | 269,100 | 1981 | 272,400 | 1980 | 264,900 | 1979 | 249,000 | 1978 | 239,900 | 1977 | 233,100 | 1976 | 261,600 | 1975 | 242,800 | 1974 | 224,300 | 1973 | 227,500 | 1972 | 213,900 | 1971 | 221,500 | 1970 | 216,500 |
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