| Year | Value | | 2023 | 234,520 | | 2022 | 234,520 | | 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 |
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