Year | Value | 2022 | 32,888 | 2021 | 32,893 | 2020 | 32,948 | 2019 | 33,017 | 2018 | 33,062 | 2017 | 33,080 | 2016 | 33,074 | 2015 | 33,058 | 2014 | 33,029 | 2013 | 32,976 | 2012 | 32,902 | 2011 | 32,744 | 2010 | 32,555 | 2009 | 32,408 | 2008 | 32,253 | 2007 | 32,091 | 2006 | 31,928 | 2005 | 31,760 | 2004 | 31,595 | 2003 | 31,428 | 2002 | 31,249 | 2001 | 30,995 | 2000 | 30,560 | 1999 | 30,048 | 1998 | 29,567 | 1997 | 29,102 | 1996 | 28,648 | 1995 | 28,204 | 1994 | 27,761 | 1993 | 27,316 | 1992 | 26,878 | 1991 | 26,566 | 1990 | 26,572 | 1989 | 26,753 | 1988 | 26,916 | 1987 | 27,056 | 1986 | 27,179 | 1985 | 27,291 | 1984 | 27,390 | 1983 | 27,478 | 1982 | 27,548 | 1981 | 27,596 | 1980 | 27,633 | 1979 | 27,809 | 1978 | 28,007 | 1977 | 28,174 | 1976 | 28,341 | 1975 | 28,515 | 1974 | 28,703 | 1973 | 28,902 | 1972 | 29,095 | 1971 | 29,283 | 1970 | 29,615 | 1969 | 30,649 | 1968 | 32,066 | 1967 | 33,406 | 1966 | 34,707 | 1965 | 35,966 | 1964 | 37,174 | 1963 | 38,321 | 1962 | 39,391 | 1961 | 40,347 | 1960 | 40,997 |
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