| Year | Value | | 2024 | 2,228 | | 2023 | 2,070 | | 2022 | 1,939 | | 2021 | 1,853 | | 2020 | 1,828 | | 2019 | 1,851 | | 2018 | 1,909 | | 2017 | 1,996 | | 2016 | 2,089 | | 2015 | 2,171 | | 2014 | 2,216 | | 2013 | 2,221 | | 2012 | 2,196 | | 2011 | 2,156 | | 2010 | 2,111 | | 2009 | 2,067 | | 2008 | 2,020 | | 2007 | 1,969 | | 2006 | 1,915 | | 2005 | 1,858 | | 2004 | 1,798 | | 2003 | 1,732 | | 2002 | 1,661 | | 2001 | 1,591 | | 2000 | 1,524 | | 1999 | 1,462 | | 1998 | 1,410 | | 1997 | 1,370 | | 1996 | 1,344 | | 1995 | 1,330 | | 1994 | 1,326 | | 1993 | 1,327 | | 1992 | 1,330 | | 1991 | 1,336 | | 1990 | 1,341 | | 1989 | 1,348 | | 1988 | 1,362 | | 1987 | 1,390 | | 1986 | 1,433 | | 1985 | 1,493 | | 1984 | 1,567 | | 1983 | 1,642 | | 1982 | 1,701 | | 1981 | 1,742 | | 1980 | 1,766 | | 1979 | 1,773 | | 1978 | 1,755 | | 1977 | 1,709 | | 1976 | 1,632 | | 1975 | 1,521 |
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