Year | Value | 2022 | 46,828 | 2021 | 47,460 | 2020 | 47,885 | 2019 | 47,669 | 2018 | 47,088 | 2017 | 46,392 | 2016 | 45,849 | 2015 | 45,457 | 2014 | 44,893 | 2013 | 44,389 | 2012 | 44,198 | 2011 | 44,403 | 2010 | 44,760 | 2009 | 45,203 | 2008 | 45,638 | 2007 | 46,069 | 2006 | 46,720 | 2005 | 47,535 | 2004 | 48,129 | 2003 | 48,349 | 2002 | 48,124 | 2001 | 47,454 | 2000 | 46,874 | 1999 | 45,931 | 1998 | 45,605 | 1997 | 46,774 | 1996 | 48,763 | 1995 | 51,173 | 1994 | 53,430 | 1993 | 55,775 | 1992 | 58,479 | 1991 | 60,157 | 1990 | 60,655 | 1989 | 61,022 | 1988 | 60,654 | 1987 | 59,962 | 1986 | 59,548 | 1985 | 58,757 | 1984 | 58,045 | 1983 | 57,930 | 1982 | 57,417 | 1981 | 56,150 | 1980 | 53,914 | 1979 | 50,648 | 1978 | 47,105 | 1977 | 44,712 | 1976 | 44,941 | 1975 | 46,948 | 1974 | 49,816 | 1973 | 53,252 | 1972 | 56,021 | 1971 | 56,579 | 1970 | 55,816 | 1969 | 54,480 | 1968 | 52,656 | 1967 | 51,747 | 1966 | 51,690 | 1965 | 52,414 | 1964 | 53,711 | 1963 | 55,281 | 1962 | 56,077 | 1961 | 56,170 | 1960 | 56,209 |
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