Year | Value | 2021 | 234,520 | 2020 | 234,520 | 2019 | 234,520 | 2018 | 234,520 | 2017 | 234,520 | 2016 | 233,858 | 2015 | 234,326 | 2014 | 234,516 | 2013 | 234,990 | 2012 | 235,010 | 2011 | 234,520 | 2010 | 235,790 | 2009 | 234,520 | 2008 | 235,170 | 2007 | 236,270 | 2006 | 236,270 | 2005 | 235,230 | 2004 | 235,570 | 2003 | 234,950 | 2002 | 236,560 | 2001 | 235,950 | 2000 | 236,690 | 1999 | 236,680 | 1998 | 236,800 | 1997 | 237,200 | 1996 | 237,550 | 1995 | 237,360 | 1994 | 237,300 | 1993 | 237,250 | 1992 | 234,810 | 1991 | 236,310 | 1990 | 236,260 | 1989 | 234,810 | 1988 | 234,790 | 1987 | 234,790 | 1986 | 234,700 | 1985 | 234,700 | 1984 | 234,650 | 1983 | 234,650 | 1982 | 234,650 | 1981 | 234,650 | 1980 | 234,630 | 1979 | 234,630 | 1978 | 234,620 | 1977 | 234,600 | 1976 | 234,600 | 1975 | 234,600 | 1974 | 234,470 | 1973 | 234,420 | 1972 | 234,370 | 1971 | 234,260 | 1970 | 234,180 | 1969 | 234,130 | 1968 | 234,030 | 1967 | 233,980 | 1966 | 233,910 | 1965 | 233,800 | 1964 | 233,700 | 1963 | 233,600 | 1962 | 233,480 | 1961 | 233,370 |
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