| Year | Value | | 2023 | 385,880 | | 2022 | 385,010 | | 2021 | 380,890 | | 2020 | 377,620 | | 2019 | 377,160 | | 2018 | 378,020 | | 2017 | 379,640 | | 2016 | 383,280 | | 2015 | 385,510 | | 2014 | 385,540 | | 2013 | 384,230 | | 2012 | 384,070 | | 2011 | 382,470 | | 2010 | 390,120 | | 2009 | 389,110 | | 2008 | 391,220 | | 2007 | 395,050 | | 2006 | 404,930 | | 2005 | 412,230 | | 2004 | 412,100 | | 2003 | 406,440 | | 2002 | 411,960 | | 2001 | 409,680 | | 2000 | 404,790 | | 1999 | 403,020 | | 1998 | 399,190 | | 1997 | 392,420 | | 1996 | 393,640 | | 1995 | 394,930 | | 1994 | 401,490 | | 1993 | 399,130 | | 1992 | 399,040 | | 1991 | 400,670 | | 1990 | 396,770 | | 1989 | 398,970 | | 1988 | 392,630 | | 1987 | 394,270 | | 1986 | 384,830 | | 1985 | 381,300 | | 1984 | 376,130 | | 1983 | 367,180 | | 1982 | 371,910 | | 1981 | 386,130 | | 1980 | 385,790 | | 1979 | 388,920 | | 1978 | 380,450 | | 1977 | 380,290 | | 1976 | 379,030 |
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