Year | Value | 2021 | 46,590 | 2020 | 46,820 | 2019 | 47,150 | 2018 | 47,460 | 2017 | 47,780 | 2016 | 48,130 | 2015 | 48,460 | 2014 | 48,700 | 2013 | 48,920 | 2012 | 49,050 | 2011 | 49,190 | 2010 | 49,530 | 2009 | 49,746 | 2008 | 49,992 | 2007 | 50,268 | 2006 | 50,534 | 2005 | 50,800 | 2004 | 51,100 | 2003 | 51,400 | 2002 | 51,750 | 2001 | 52,130 | 2000 | 52,580 | 1999 | 53,210 | 1998 | 53,760 | 1997 | 54,370 | 1996 | 55,000 | 1995 | 55,620 | 1994 | 56,250 | 1993 | 56,860 | 1992 | 57,360 | 1991 | 57,840 | 1990 | 58,320 | 1989 | 58,780 | 1988 | 59,250 | 1987 | 59,580 | 1986 | 59,850 | 1985 | 60,160 | 1984 | 60,430 | 1983 | 60,690 | 1982 | 60,940 | 1981 | 61,210 | 1980 | 61,520 | 1979 | 61,760 | 1978 | 62,080 | 1977 | 62,400 | 1976 | 62,730 | 1975 | 63,230 | 1974 | 63,770 | 1973 | 64,220 | 1972 | 64,710 | 1971 | 65,430 | 1970 | 66,960 | 1969 | 66,520 | 1968 | 67,970 | 1967 | 68,380 | 1966 | 68,960 | 1965 | 70,040 | 1964 | 70,300 | 1963 | 70,200 | 1962 | 71,200 | 1961 | 71,100 |
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