| Year | Value | | 2022 | 13,601 | | 2021 | 13,096 | | 2020 | 12,611 | | 2019 | 12,114 | | 2018 | 11,613 | | 2017 | 11,144 | | 2016 | 10,732 | | 2015 | 10,423 | | 2014 | 10,242 | | 2013 | 10,141 | | 2012 | 10,049 | | 2011 | 9,923 | | 2010 | 9,715 | | 2009 | 9,393 | | 2008 | 9,014 | | 2007 | 8,656 | | 2006 | 8,320 | | 2005 | 8,020 | | 2004 | 7,768 | | 2003 | 7,538 | | 2002 | 7,293 | | 2001 | 7,021 | | 2000 | 6,759 | | 1999 | 6,510 | | 1998 | 6,251 | | 1997 | 5,983 | | 1996 | 5,752 | | 1995 | 5,582 | | 1994 | 5,490 | | 1993 | 5,349 | | 1992 | 5,425 | | 1991 | 5,446 | | 1990 | 4,975 | | 1989 | 4,471 | | 1988 | 4,117 | | 1987 | 3,839 | | 1986 | 3,583 | | 1985 | 3,370 | | 1984 | 3,201 | | 1983 | 3,068 | | 1982 | 2,949 | | 1981 | 2,819 | | 1980 | 2,662 | | 1979 | 2,474 | | 1978 | 2,264 | | 1977 | 2,053 | | 1976 | 1,854 | | 1975 | 1,682 | | 1974 | 1,540 | | 1973 | 1,423 | | 1972 | 1,321 | | 1971 | 1,231 | | 1970 | 1,149 | | 1969 | 1,072 | | 1968 | 1,006 | | 1967 | 949 | | 1966 | 893 | | 1965 | 839 | | 1964 | 789 | | 1963 | 743 | | 1962 | 705 | | 1961 | 674 | | 1960 | 646 |
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