Year | Value | 2021 | 262,284.464 | 2020 | 261,426.381 | 2019 | 262,066.906 | 2018 | 261,833.239 | 2017 | 262,955.3 | 2016 | 262,657 | 2015 | 265,765 | 2014 | 265,780 | 2013 | 267,332 | 2012 | 269,420 | 2011 | 270,140 | 2010 | 275,450 | 2009 | 279,700 | 2008 | 281,420 | 2007 | 280,040 | 2006 | 286,130 | 2005 | 291,640 | 2004 | 290,710 | 2003 | 291,530 | 2002 | 294,190 | 2001 | 295,200 | 2000 | 297,660 | 1999 | 297,780 | 1998 | 299,580 | 1997 | 300,590 | 1996 | 301,390 | 1995 | 297,190 | 1994 | 301,830 | 1993 | 300,330 | 1992 | 302,790 | 1991 | 303,710 | 1990 | 304,720 | 1989 | 307,010 | 1988 | 305,780 | 1987 | 306,010 | 1986 | 306,100 | 1985 | 307,120 | 1984 | 306,280 | 1983 | 307,910 | 1982 | 311,910 | 1981 | 312,060 | 1980 | 312,380 | 1979 | 313,550 | 1978 | 314,780 | 1977 | 315,900 | 1976 | 315,160 | 1975 | 319,210 | 1974 | 320,780 | 1973 | 322,800 | 1972 | 325,680 | 1971 | 326,840 | 1970 | 321,190 | 1969 | 325,270 | 1968 | 321,590 | 1967 | 323,820 | 1966 | 321,560 | 1965 | 326,940 | 1964 | 327,530 | 1963 | 331,370 | 1962 | 332,320 | 1961 | 332,300 |
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