| Year | Value | | 2023 | 381,160 | | 2022 | 383,130 | | 2021 | 383,130 | | 2020 | 383,130 | | 2019 | 380,100 | | 2018 | 380,100 | | 2017 | 379,100 | | 2016 | 379,100 | | 2015 | 379,100 | | 2014 | 379,100 | | 2013 | 379,100 | | 2012 | 379,140 | | 2011 | 379,150 | | 2010 | 379,170 | | 2009 | 379,160 | | 2008 | 379,160 | | 2007 | 379,140 | | 2006 | 379,100 | | 2005 | 379,170 | | 2004 | 379,280 | | 2003 | 378,840 | | 2002 | 377,900 | | 2001 | 377,950 | | 2000 | 377,940 | | 1999 | 377,640 | | 1998 | 378,680 | | 1997 | 377,950 | | 1996 | 377,570 | | 1995 | 377,630 | | 1994 | 378,130 | | 1993 | 379,340 | | 1992 | 380,300 | | 1991 | 380,300 | | 1990 | 380,400 | | 1989 | 380,400 | | 1988 | 380,400 | | 1987 | 380,450 | | 1986 | 380,540 | | 1985 | 380,540 | | 1984 | 380,540 | | 1983 | 380,540 | | 1982 | 380,540 | | 1981 | 380,530 | | 1980 | 380,490 | | 1979 | 380,490 | | 1978 | 380,500 | | 1977 | 380,500 | | 1976 | 380,500 | | 1975 | 380,503 |
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