Year | Value | 2022 | 30,712 | 2021 | 29,851 | 2020 | 29,147 | 2019 | 29,035 | 2018 | 29,062 | 2017 | 28,621 | 2016 | 27,892 | 2015 | 26,925 | 2014 | 25,774 | 2013 | 24,483 | 2012 | 23,171 | 2011 | 22,022 | 2010 | 21,175 | 2009 | 20,703 | 2008 | 20,696 | 2007 | 21,044 | 2006 | 21,431 | 2005 | 21,660 | 2004 | 21,717 | 2003 | 21,556 | 2002 | 21,237 | 2001 | 21,073 | 2000 | 21,238 | 1999 | 21,664 | 1998 | 22,327 | 1997 | 23,184 | 1996 | 24,018 | 1995 | 24,713 | 1994 | 25,306 | 1993 | 25,813 | 1992 | 26,213 | 1991 | 26,490 | 1990 | 26,697 | 1989 | 26,894 | 1988 | 27,095 | 1987 | 27,271 | 1986 | 27,282 | 1985 | 27,001 | 1984 | 26,391 | 1983 | 25,454 | 1982 | 24,276 | 1981 | 23,186 | 1980 | 22,455 | 1979 | 22,073 | 1978 | 22,051 | 1977 | 22,250 | 1976 | 22,260 | 1975 | 21,815 | 1974 | 20,952 | 1973 | 19,682 | 1972 | 18,126 | 1971 | 16,665 | 1970 | 15,607 | 1969 | 14,942 | 1968 | 14,606 | 1967 | 14,515 | 1966 | 14,384 | 1965 | 14,026 | 1964 | 13,469 | 1963 | 12,726 | 1962 | 11,853 | 1961 | 11,065 | 1960 | 10,499 |
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