| Year | Value | | 2024 | 2,214 | | 2023 | 2,326 | | 2022 | 2,412 | | 2021 | 2,458 | | 2020 | 2,460 | | 2019 | 2,403 | | 2018 | 2,300 | | 2017 | 2,204 | | 2016 | 2,101 | | 2015 | 2,001 | | 2014 | 1,937 | | 2013 | 1,901 | | 2012 | 1,864 | | 2011 | 1,821 | | 2010 | 1,790 | | 2009 | 1,750 | | 2008 | 1,711 | | 2007 | 1,676 | | 2006 | 1,646 | | 2005 | 1,614 | | 2004 | 1,573 | | 2003 | 1,541 | | 2002 | 1,524 | | 2001 | 1,516 | | 2000 | 1,518 | | 1999 | 1,518 | | 1998 | 1,507 | | 1997 | 1,489 | | 1996 | 1,485 | | 1995 | 1,500 | | 1994 | 1,527 | | 1993 | 1,562 | | 1992 | 1,587 | | 1991 | 1,587 | | 1990 | 1,572 | | 1989 | 1,551 | | 1988 | 1,535 | | 1987 | 1,531 | | 1986 | 1,552 | | 1985 | 1,582 | | 1984 | 1,598 | | 1983 | 1,607 | | 1982 | 1,605 | | 1981 | 1,586 | | 1980 | 1,561 | | 1979 | 1,538 | | 1978 | 1,518 | | 1977 | 1,502 | | 1976 | 1,485 | | 1975 | 1,458 |
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