| Year | Value | | 2022 | 54,173 | | 2021 | 52,779 | | 2020 | 51,519 | | 2019 | 50,266 | | 2018 | 48,977 | | 2017 | 47,670 | | 2016 | 46,333 | | 2015 | 44,980 | | 2014 | 43,626 | | 2013 | 42,292 | | 2012 | 40,669 | | 2011 | 38,752 | | 2010 | 36,876 | | 2009 | 35,031 | | 2008 | 33,392 | | 2007 | 32,447 | | 2006 | 32,038 | | 2005 | 31,707 | | 2004 | 31,465 | | 2003 | 31,107 | | 2002 | 30,502 | | 2001 | 29,823 | | 2000 | 29,058 | | 1999 | 28,153 | | 1998 | 27,280 | | 1997 | 26,521 | | 1996 | 25,890 | | 1995 | 25,305 | | 1994 | 24,651 | | 1993 | 23,954 | | 1992 | 23,116 | | 1991 | 22,343 | | 1990 | 21,768 | | 1989 | 21,277 | | 1988 | 20,785 | | 1987 | 20,236 | | 1986 | 19,710 | | 1985 | 19,207 | | 1984 | 18,721 | | 1983 | 18,246 | | 1982 | 17,774 | | 1981 | 17,314 | | 1980 | 16,871 | | 1979 | 16,439 | | 1978 | 16,017 | | 1977 | 15,614 | | 1976 | 15,216 | | 1975 | 14,819 | | 1974 | 14,437 | | 1973 | 14,068 | | 1972 | 13,709 | | 1971 | 13,358 | | 1970 | 13,013 | | 1969 | 12,668 | | 1968 | 12,328 | | 1967 | 11,999 | | 1966 | 11,675 | | 1965 | 11,356 | | 1964 | 11,041 | | 1963 | 10,727 | | 1962 | 10,417 | | 1961 | 10,115 | | 1960 | 9,822 |
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