| Year | Value | | 2022 | 26,073 | | 2021 | 25,067 | | 2020 | 24,075 | | 2019 | 23,089 | | 2018 | 22,117 | | 2017 | 21,177 | | 2016 | 20,277 | | 2015 | 19,418 | | 2014 | 18,597 | | 2013 | 17,816 | | 2012 | 17,071 | | 2011 | 16,363 | | 2010 | 15,691 | | 2009 | 15,044 | | 2008 | 14,434 | | 2007 | 13,886 | | 2006 | 13,406 | | 2005 | 13,075 | | 2004 | 12,942 | | 2003 | 12,907 | | 2002 | 12,813 | | 2001 | 12,601 | | 2000 | 12,294 | | 1999 | 11,863 | | 1998 | 11,338 | | 1997 | 10,792 | | 1996 | 10,322 | | 1995 | 9,979 | | 1994 | 9,795 | | 1993 | 9,541 | | 1992 | 9,676 | | 1991 | 9,715 | | 1990 | 8,890 | | 1989 | 7,999 | | 1988 | 7,377 | | 1987 | 6,893 | | 1986 | 6,449 | | 1985 | 6,075 | | 1984 | 5,779 | | 1983 | 5,548 | | 1982 | 5,343 | | 1981 | 5,124 | | 1980 | 4,854 | | 1979 | 4,525 | | 1978 | 4,154 | | 1977 | 3,771 | | 1976 | 3,412 | | 1975 | 3,101 | | 1974 | 2,843 | | 1973 | 2,632 | | 1972 | 2,448 | | 1971 | 2,282 | | 1970 | 2,133 | | 1969 | 1,995 | | 1968 | 1,877 | | 1967 | 1,775 | | 1966 | 1,677 | | 1965 | 1,585 | | 1964 | 1,498 | | 1963 | 1,421 | | 1962 | 1,354 | | 1961 | 1,295 | | 1960 | 1,242 |
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