Year | Value | 2022 | 26,731 | 2021 | 26,157 | 2020 | 25,424 | 2019 | 24,480 | 2018 | 23,649 | 2017 | 23,029 | 2016 | 22,497 | 2015 | 22,017 | 2014 | 21,388 | 2013 | 20,775 | 2012 | 20,138 | 2011 | 19,372 | 2010 | 18,856 | 2009 | 18,475 | 2008 | 18,004 | 2007 | 17,677 | 2006 | 17,677 | 2005 | 17,764 | 2004 | 17,952 | 2003 | 18,295 | 2002 | 18,635 | 2001 | 18,899 | 2000 | 18,846 | 1999 | 18,791 | 1998 | 18,939 | 1997 | 18,926 | 1996 | 18,697 | 1995 | 18,355 | 1994 | 17,932 | 1993 | 17,519 | 1992 | 17,215 | 1991 | 16,881 | 1990 | 16,475 | 1989 | 16,162 | 1988 | 15,820 | 1987 | 15,480 | 1986 | 15,176 | 1985 | 14,930 | 1984 | 14,772 | 1983 | 14,719 | 1982 | 14,771 | 1981 | 14,797 | 1980 | 14,607 | 1979 | 14,227 | 1978 | 13,848 | 1977 | 13,509 | 1976 | 13,112 | 1975 | 12,795 | 1974 | 12,662 | 1973 | 12,507 | 1972 | 12,281 | 1971 | 12,100 | 1970 | 12,061 | 1969 | 11,990 | 1968 | 11,928 | 1967 | 12,003 | 1966 | 12,150 | 1965 | 12,429 | 1964 | 12,771 | 1963 | 13,066 | 1962 | 13,241 | 1961 | 13,145 | 1960 | 12,729 |
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