Year | Value | 2022 | 31,312 | 2021 | 31,735 | 2020 | 31,446 | 2019 | 30,230 | 2018 | 28,937 | 2017 | 27,641 | 2016 | 26,437 | 2015 | 25,423 | 2014 | 24,626 | 2013 | 23,986 | 2012 | 23,404 | 2011 | 22,779 | 2010 | 22,018 | 2009 | 21,060 | 2008 | 19,927 | 2007 | 18,727 | 2006 | 17,574 | 2005 | 16,521 | 2004 | 15,564 | 2003 | 14,688 | 2002 | 14,012 | 2001 | 13,521 | 2000 | 13,090 | 1999 | 12,734 | 1998 | 12,445 | 1997 | 12,191 | 1996 | 11,950 | 1995 | 11,709 | 1994 | 11,454 | 1993 | 11,188 | 1992 | 10,928 | 1991 | 10,698 | 1990 | 10,516 | 1989 | 10,385 | 1988 | 10,304 | 1987 | 10,265 | 1986 | 10,259 | 1985 | 10,285 | 1984 | 10,338 | 1983 | 10,420 | 1982 | 10,530 | 1981 | 10,468 | 1980 | 10,203 | 1979 | 9,866 | 1978 | 9,450 | 1977 | 9,005 | 1976 | 8,586 | 1975 | 8,238 | 1974 | 7,981 | 1973 | 7,716 | 1972 | 7,598 | 1971 | 7,608 | 1970 | 7,474 | 1969 | 7,233 | 1968 | 6,926 | 1967 | 6,558 | 1966 | 6,145 | 1965 | 5,737 | 1964 | 5,365 | 1963 | 4,994 | 1962 | 4,770 | 1961 | 4,700 | 1960 | 4,627 |
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