Year | Value | 2021 | 43,370 | 2020 | 45,120 | 2019 | 45,240 | 2018 | 45,160 | 2017 | 44,890 | 2016 | 44,610 | 2015 | 44,300 | 2014 | 44,660 | 2013 | 44,770 | 2012 | 45,330 | 2011 | 45,550 | 2010 | 45,680 | 2009 | 45,939.2 | 2008 | 46,290 | 2007 | 42,760 | 2006 | 42,600 | 2005 | 43,020 | 2004 | 43,050 | 2003 | 43,700 | 2002 | 43,730 | 2001 | 44,100 | 2000 | 43,961.6 | 1999 | 43,833.2 | 1998 | 43,694.8 | 1997 | 43,556.4 | 1996 | 43,418 | 1995 | 43,887 | 1994 | 43,936 | 1993 | 44,073 | 1992 | 44,162 | 1991 | 44,448 | 1990 | 45,374 | 1989 | 46,767 | 1988 | 48,005 | 1987 | 48,170 | 1986 | 48,449 | 1985 | 48,836 | 1984 | 48,934 | 1983 | 48,765 | 1982 | 48,952 | 1981 | 49,091 | 1980 | 49,315 | 1979 | 48,962 | 1978 | 48,853 | 1977 | 48,808 | 1976 | 48,520 | 1975 | 48,355 | 1974 | 48,488 | 1973 | 48,420 | 1972 | 48,274 | 1971 | 48,240 | 1970 | 47,943 | 1969 | 48,160 | 1968 | 48,029 | 1967 | 47,826 | 1966 | 47,537 | 1965 | 47,078 | 1964 | 46,596 | 1963 | 46,169 | 1962 | 46,137 | 1961 | 45,580 |
|