| Year | Value | | 2022 | 34,072 | | 2021 | 34,059 | | 2020 | 33,689 | | 2019 | 32,422 | | 2018 | 31,370 | | 2017 | 30,537 | | 2016 | 29,494 | | 2015 | 28,303 | | 2014 | 27,187 | | 2013 | 26,137 | | 2012 | 25,100 | | 2011 | 24,071 | | 2010 | 23,035 | | 2009 | 21,962 | | 2008 | 20,879 | | 2007 | 19,806 | | 2006 | 18,753 | | 2005 | 17,704 | | 2004 | 16,661 | | 2003 | 15,627 | | 2002 | 14,614 | | 2001 | 13,664 | | 2000 | 12,808 | | 1999 | 12,031 | | 1998 | 11,330 | | 1997 | 10,718 | | 1996 | 10,172 | | 1995 | 9,664 | | 1994 | 9,199 | | 1993 | 8,775 | | 1992 | 8,386 | | 1991 | 8,035 | | 1990 | 7,726 | | 1989 | 7,447 | | 1988 | 7,200 | | 1987 | 6,967 | | 1986 | 6,731 | | 1985 | 6,499 | | 1984 | 6,270 | | 1983 | 6,042 | | 1982 | 5,821 | | 1981 | 5,613 | | 1980 | 5,421 | | 1979 | 5,244 | | 1978 | 5,078 | | 1977 | 4,919 | | 1976 | 4,764 | | 1975 | 4,615 | | 1974 | 4,473 | | 1973 | 4,333 | | 1972 | 4,195 | | 1971 | 4,072 | | 1970 | 3,971 | | 1969 | 3,888 | | 1968 | 3,819 | | 1967 | 3,763 | | 1966 | 3,717 | | 1965 | 3,678 | | 1964 | 3,652 | | 1963 | 3,635 | | 1962 | 3,619 | | 1961 | 3,590 | | 1960 | 3,528 |
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