Year | Value | 2022 | 28,649 | 2021 | 28,631 | 2020 | 28,511 | 2019 | 28,193 | 2018 | 27,738 | 2017 | 27,237 | 2016 | 26,687 | 2015 | 26,063 | 2014 | 25,313 | 2013 | 24,392 | 2012 | 23,348 | 2011 | 22,235 | 2010 | 21,129 | 2009 | 20,740 | 2008 | 21,108 | 2007 | 21,268 | 2006 | 21,660 | 2005 | 22,675 | 2004 | 23,120 | 2003 | 23,066 | 2002 | 23,344 | 2001 | 23,812 | 2000 | 24,299 | 1999 | 24,748 | 1998 | 25,130 | 1997 | 25,436 | 1996 | 25,733 | 1995 | 26,021 | 1994 | 26,194 | 1993 | 26,222 | 1992 | 26,077 | 1991 | 25,718 | 1990 | 25,158 | 1989 | 24,473 | 1988 | 23,738 | 1987 | 22,993 | 1986 | 22,330 | 1985 | 21,658 | 1984 | 20,904 | 1983 | 20,206 | 1982 | 19,616 | 1981 | 19,115 | 1980 | 18,685 | 1979 | 18,301 | 1978 | 17,932 | 1977 | 17,534 | 1976 | 17,061 | 1975 | 16,447 | 1974 | 15,687 | 1973 | 14,861 | 1972 | 14,005 | 1971 | 13,132 | 1970 | 12,261 | 1969 | 11,413 | 1968 | 10,616 | 1967 | 9,895 | 1966 | 9,262 | 1965 | 8,748 | 1964 | 8,361 | 1963 | 8,053 | 1962 | 7,801 | 1961 | 7,598 | 1960 | 7,436 |
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