Year | Value | 2022 | 47,657 | 2021 | 47,606 | 2020 | 47,642 | 2019 | 47,712 | 2018 | 47,761 | 2017 | 47,785 | 2016 | 47,788 | 2015 | 47,790 | 2014 | 47,789 | 2013 | 47,767 | 2012 | 47,727 | 2011 | 47,581 | 2010 | 47,403 | 2009 | 47,286 | 2008 | 47,156 | 2007 | 47,015 | 2006 | 46,874 | 2005 | 46,725 | 2004 | 46,580 | 2003 | 46,431 | 2002 | 46,264 | 2001 | 45,986 | 2000 | 45,461 | 1999 | 44,825 | 1998 | 44,230 | 1997 | 43,656 | 1996 | 43,097 | 1995 | 42,550 | 1994 | 42,001 | 1993 | 41,447 | 1992 | 40,900 | 1991 | 40,542 | 1990 | 40,636 | 1989 | 40,992 | 1988 | 41,321 | 1987 | 41,617 | 1986 | 41,889 | 1985 | 42,144 | 1984 | 42,380 | 1983 | 42,600 | 1982 | 42,794 | 1981 | 42,953 | 1980 | 43,097 | 1979 | 43,278 | 1978 | 43,465 | 1977 | 43,603 | 1976 | 43,740 | 1975 | 43,888 | 1974 | 44,056 | 1973 | 44,242 | 1972 | 44,416 | 1971 | 44,583 | 1970 | 44,968 | 1969 | 46,135 | 1968 | 47,772 | 1967 | 49,269 | 1966 | 50,683 | 1965 | 52,016 | 1964 | 53,255 | 1963 | 54,391 | 1962 | 55,404 | 1961 | 56,247 | 1960 | 56,660 |
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