| Year | Value | | 2022 | 46,085 | | 2021 | 44,372 | | 2020 | 42,769 | | 2019 | 41,105 | | 2018 | 39,487 | | 2017 | 38,011 | | 2016 | 36,622 | | 2015 | 35,335 | | 2014 | 34,111 | | 2013 | 32,919 | | 2012 | 31,730 | | 2011 | 30,515 | | 2010 | 29,273 | | 2009 | 28,023 | | 2008 | 26,796 | | 2007 | 25,626 | | 2006 | 24,541 | | 2005 | 23,555 | | 2004 | 22,664 | | 2003 | 21,838 | | 2002 | 21,055 | | 2001 | 20,304 | | 2000 | 19,578 | | 1999 | 18,875 | | 1998 | 18,202 | | 1997 | 17,563 | | 1996 | 16,965 | | 1995 | 16,410 | | 1994 | 15,893 | | 1993 | 15,407 | | 1992 | 14,934 | | 1991 | 14,463 | | 1990 | 13,990 | | 1989 | 13,537 | | 1988 | 13,111 | | 1987 | 12,721 | | 1986 | 12,389 | | 1985 | 12,119 | | 1984 | 11,898 | | 1983 | 11,699 | | 1982 | 11,503 | | 1981 | 11,293 | | 1980 | 11,053 | | 1979 | 10,772 | | 1978 | 10,457 | | 1977 | 10,115 | | 1976 | 9,756 | | 1975 | 9,396 | | 1974 | 9,057 | | 1973 | 8,751 | | 1972 | 8,482 | | 1971 | 8,249 | | 1970 | 8,038 | | 1969 | 7,830 | | 1968 | 7,611 | | 1967 | 7,369 | | 1966 | 7,099 | | 1965 | 6,808 | | 1964 | 6,510 | | 1963 | 6,217 | | 1962 | 5,948 | | 1961 | 5,718 | | 1960 | 5,538 |
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