Year | Value | 2022 | 52,422 | 2021 | 50,472 | 2020 | 50,177 | 2019 | 49,693 | 2018 | 49,282 | 2017 | 49,339 | 2016 | 49,776 | 2015 | 50,439 | 2014 | 51,204 | 2013 | 51,716 | 2012 | 51,402 | 2011 | 49,990 | 2010 | 47,906 | 2009 | 45,622 | 2008 | 43,241 | 2007 | 40,708 | 2006 | 38,210 | 2005 | 36,059 | 2004 | 34,146 | 2003 | 32,356 | 2002 | 30,721 | 2001 | 29,252 | 2000 | 27,999 | 1999 | 26,958 | 1998 | 26,056 | 1997 | 25,241 | 1996 | 24,474 | 1995 | 23,722 | 1994 | 22,975 | 1993 | 22,232 | 1992 | 21,488 | 1991 | 20,765 | 1990 | 20,076 | 1989 | 19,450 | 1988 | 18,904 | 1987 | 18,419 | 1986 | 17,990 | 1985 | 17,630 | 1984 | 17,328 | 1983 | 17,093 | 1982 | 17,037 | 1981 | 17,052 | 1980 | 16,971 | 1979 | 16,819 | 1978 | 16,638 | 1977 | 16,491 | 1976 | 16,385 | 1975 | 16,313 | 1974 | 16,304 | 1973 | 16,369 | 1972 | 16,467 | 1971 | 16,557 | 1970 | 16,652 | 1969 | 16,748 | 1968 | 16,860 | 1967 | 16,993 | 1966 | 17,130 | 1965 | 17,268 | 1964 | 17,411 | 1963 | 17,568 | 1962 | 17,740 | 1961 | 17,912 | 1960 | 18,090 |
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