Year | Value | 2022 | 47,260 | 2021 | 46,180 | 2020 | 45,160 | 2019 | 44,543 | 2018 | 44,556 | 2017 | 45,225 | 2016 | 46,530 | 2015 | 48,260 | 2014 | 50,080 | 2013 | 51,661 | 2012 | 52,672 | 2011 | 52,928 | 2010 | 52,518 | 2009 | 51,522 | 2008 | 50,217 | 2007 | 48,824 | 2006 | 47,606 | 2005 | 46,873 | 2004 | 46,650 | 2003 | 46,924 | 2002 | 47,722 | 2001 | 49,061 | 2000 | 50,660 | 1999 | 52,181 | 1998 | 53,277 | 1997 | 54,002 | 1996 | 53,976 | 1995 | 53,447 | 1994 | 52,575 | 1993 | 51,207 | 1992 | 50,019 | 1991 | 48,991 | 1990 | 48,014 | 1989 | 46,959 | 1988 | 45,855 | 1987 | 44,869 | 1986 | 43,934 | 1985 | 43,138 | 1984 | 42,257 | 1983 | 40,855 | 1982 | 38,977 | 1981 | 36,483 | 1980 | 33,734 | 1979 | 31,259 | 1978 | 29,180 | 1977 | 27,477 | 1976 | 25,921 | 1975 | 24,613 | 1974 | 23,549 | 1973 | 22,788 | 1972 | 22,377 | 1971 | 22,281 | 1970 | 22,336 | 1969 | 22,365 | 1968 | 22,264 | 1967 | 22,015 | 1966 | 21,658 | 1965 | 21,255 | 1964 | 20,931 | 1963 | 20,823 | 1962 | 21,034 | 1961 | 21,430 | 1960 | 22,152 |
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