Year | Value | 2022 | 35,457 | 2021 | 36,270 | 2020 | 37,245 | 2019 | 38,066 | 2018 | 38,953 | 2017 | 39,499 | 2016 | 39,832 | 2015 | 40,109 | 2014 | 40,067 | 2013 | 39,795 | 2012 | 39,584 | 2011 | 39,279 | 2010 | 39,377 | 2009 | 39,844 | 2008 | 40,012 | 2007 | 40,007 | 2006 | 39,608 | 2005 | 38,577 | 2004 | 37,003 | 2003 | 34,843 | 2002 | 32,403 | 2001 | 30,444 | 2000 | 28,837 | 1999 | 27,114 | 1998 | 25,157 | 1997 | 23,031 | 1996 | 21,286 | 1995 | 20,110 | 1994 | 19,747 | 1993 | 20,462 | 1992 | 21,868 | 1991 | 23,267 | 1990 | 24,455 | 1989 | 25,610 | 1988 | 27,479 | 1987 | 30,044 | 1986 | 32,471 | 1985 | 34,617 | 1984 | 36,080 | 1983 | 35,608 | 1982 | 33,507 | 1981 | 31,339 | 1980 | 29,644 | 1979 | 28,418 | 1978 | 27,337 | 1977 | 26,195 | 1976 | 25,171 | 1975 | 24,428 | 1974 | 23,901 | 1973 | 23,599 | 1972 | 23,416 | 1971 | 23,121 | 1970 | 22,528 | 1969 | 21,710 | 1968 | 20,512 | 1967 | 18,939 | 1966 | 17,310 | 1965 | 15,758 | 1964 | 14,344 | 1963 | 13,357 | 1962 | 12,876 | 1961 | 12,546 | 1960 | 12,249 |
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