Year | Value | 2022 | 25,955 | 2021 | 26,189 | 2020 | 26,401 | 2019 | 26,486 | 2018 | 26,333 | 2017 | 25,902 | 2016 | 25,242 | 2015 | 24,453 | 2014 | 23,629 | 2013 | 22,801 | 2012 | 21,973 | 2011 | 21,155 | 2010 | 20,440 | 2009 | 19,936 | 2008 | 19,511 | 2007 | 18,979 | 2006 | 18,323 | 2005 | 17,684 | 2004 | 17,409 | 2003 | 17,665 | 2002 | 18,156 | 2001 | 18,524 | 2000 | 18,598 | 1999 | 18,301 | 1998 | 17,631 | 1997 | 16,775 | 1996 | 15,989 | 1995 | 15,428 | 1994 | 15,143 | 1993 | 15,063 | 1992 | 15,040 | 1991 | 14,939 | 1990 | 14,640 | 1989 | 14,248 | 1988 | 14,003 | 1987 | 13,883 | 1986 | 13,794 | 1985 | 13,727 | 1984 | 13,681 | 1983 | 13,660 | 1982 | 13,662 | 1981 | 13,686 | 1980 | 13,472 | 1979 | 13,025 | 1978 | 12,669 | 1977 | 12,459 | 1976 | 12,360 | 1975 | 12,291 | 1974 | 12,158 | 1973 | 11,896 | 1972 | 11,547 | 1971 | 11,227 | 1970 | 10,993 | 1969 | 10,837 | 1968 | 10,749 | 1967 | 10,707 | 1966 | 10,643 | 1965 | 10,503 | 1964 | 10,290 | 1963 | 10,015 | 1962 | 9,690 | 1961 | 9,386 | 1960 | 9,153 |
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