Year | Value | 2022 | 48,472 | 2021 | 49,406 | 2020 | 49,919 | 2019 | 49,982 | 2018 | 49,330 | 2017 | 48,256 | 2016 | 47,116 | 2015 | 46,172 | 2014 | 45,607 | 2013 | 45,680 | 2012 | 46,388 | 2011 | 47,754 | 2010 | 49,592 | 2009 | 51,504 | 2008 | 53,186 | 2007 | 54,284 | 2006 | 54,582 | 2005 | 54,170 | 2004 | 53,179 | 2003 | 51,870 | 2002 | 50,456 | 2001 | 49,259 | 2000 | 48,510 | 1999 | 48,242 | 1998 | 48,293 | 1997 | 48,996 | 1996 | 50,156 | 1995 | 51,693 | 1994 | 53,316 | 1993 | 54,477 | 1992 | 55,325 | 1991 | 55,422 | 1990 | 55,002 | 1989 | 54,291 | 1988 | 53,217 | 1987 | 52,124 | 1986 | 51,126 | 1985 | 50,099 | 1984 | 48,891 | 1983 | 47,735 | 1982 | 47,031 | 1981 | 46,413 | 1980 | 45,740 | 1979 | 44,744 | 1978 | 43,103 | 1977 | 40,902 | 1976 | 38,022 | 1975 | 35,041 | 1974 | 32,334 | 1973 | 30,029 | 1972 | 28,196 | 1971 | 26,809 | 1970 | 25,704 | 1969 | 24,832 | 1968 | 24,200 | 1967 | 23,791 | 1966 | 23,574 | 1965 | 23,466 | 1964 | 23,334 | 1963 | 23,077 | 1962 | 22,720 | 1961 | 22,406 | 1960 | 22,813 |
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