| Year | Value | | 2022 | 22,940 | | 2021 | 21,961 | | 2020 | 21,405 | | 2019 | 20,726 | | 2018 | 19,548 | | 2017 | 18,352 | | 2016 | 17,150 | | 2015 | 15,930 | | 2014 | 14,724 | | 2013 | 13,565 | | 2012 | 12,450 | | 2011 | 11,398 | | 2010 | 10,446 | | 2009 | 9,623 | | 2008 | 8,947 | | 2007 | 8,428 | | 2006 | 8,054 | | 2005 | 7,772 | | 2004 | 7,525 | | 2003 | 7,285 | | 2002 | 7,035 | | 2001 | 6,777 | | 2000 | 6,513 | | 1999 | 6,254 | | 1998 | 6,017 | | 1997 | 5,801 | | 1996 | 5,594 | | 1995 | 5,397 | | 1994 | 5,206 | | 1993 | 5,015 | | 1992 | 4,825 | | 1991 | 4,637 | | 1990 | 4,459 | | 1989 | 4,290 | | 1988 | 4,134 | | 1987 | 4,002 | | 1986 | 3,887 | | 1985 | 3,780 | | 1984 | 3,683 | | 1983 | 3,590 | | 1982 | 3,492 | | 1981 | 3,384 | | 1980 | 3,270 | | 1979 | 3,172 | | 1978 | 3,078 | | 1977 | 2,957 | | 1976 | 2,834 | | 1975 | 2,728 | | 1974 | 2,637 | | 1973 | 2,567 | | 1972 | 2,530 | | 1971 | 2,493 | | 1970 | 2,428 | | 1969 | 2,354 | | 1968 | 2,271 | | 1967 | 2,180 | | 1966 | 2,092 | | 1965 | 2,013 | | 1964 | 1,943 | | 1963 | 1,879 | | 1962 | 1,821 | | 1961 | 1,762 | | 1960 | 1,699 |
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