Year | Value | 2021 | 458,970 | 2020 | 458,920 | 2019 | 458,770 | 2018 | 457,920 | 2017 | 457,720 | 2016 | 458,240 | 2015 | 457,890 | 2014 | 456,740 | 2013 | 454,880 | 2012 | 453,030 | 2011 | 453,160 | 2010 | 448,500 | 2009 | 446,300 | 2008 | 441,950 | 2007 | 442,450 | 2006 | 441,370 | 2005 | 441,830 | 2004 | 443,100 | 2003 | 444,990 | 2002 | 444,380 | 2001 | 444,150 | 2000 | 445,230 | 1999 | 445,670 | 1998 | 445,130 | 1997 | 444,500 | 1996 | 444,470 | 1995 | 444,900 | 1994 | 445,100 | 1993 | 445,100 | 1992 | 445,110 | 1991 | 444,830 | 1990 | 444,560 | 1989 | 444,780 | 1988 | 445,010 | 1987 | 445,230 | 1986 | 445,450 | 1985 | 446,280 | 1984 | 446,500 | 1983 | 446,780 | 1982 | 447,050 | 1981 | 447,280 | 1980 | 447,650 | 1979 | 447,930 | 1978 | 448,250 | 1977 | 448,480 | 1976 | 448,700 | 1975 | 450,930 | 1974 | 451,150 | 1973 | 451,370 | 1972 | 451,600 | 1971 | 451,820 | 1970 | 452,050 | 1969 | 452,270 | 1968 | 452,100 | 1967 | 452,020 | 1966 | 451,950 | 1965 | 451,870 | 1964 | 451,900 | 1963 | 451,820 | 1962 | 451,850 | 1961 | 451,770 |
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