Year | Value | 2021 | 235,000 | 2020 | 232,718.997 | 2019 | 230,000 | 2018 | 228,456.965 | 2017 | 228,470 | 2016 | 228,420 | 2015 | 228,460 | 2014 | 228,420 | 2013 | 228,362.654 | 2012 | 228,320 | 2011 | 228,280 | 2010 | 228,240 | 2009 | 227,310 | 2008 | 226,380 | 2007 | 225,450 | 2006 | 224,530 | 2005 | 223,600 | 2004 | 222,670 | 2003 | 221,740 | 2002 | 220,810 | 2001 | 219,880 | 2000 | 218,950 | 1999 | 218,020 | 1998 | 217,090 | 1997 | 216,170 | 1996 | 215,240 | 1995 | 214,310 | 1994 | 213,380 | 1993 | 212,450 | 1992 | 213,740 | 1991 | 215,160 | 1990 | 213,830 | 1989 | 213,370 | 1988 | 213,300 | 1987 | 212,400 | 1986 | 207,750 | 1985 | 205,770 | 1984 | 200,510 | 1983 | 198,980 | 1982 | 197,790 | 1981 | 193,410 | 1980 | 189,380 | 1979 | 187,020 | 1978 | 183,760 | 1977 | 179,650 | 1976 | 175,480 | 1975 | 172,200 | 1974 | 168,830 |
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