| Year | Value | | 2024 | 1,591 | | 2023 | 1,552 | | 2022 | 1,532 | | 2021 | 1,560 | | 2020 | 1,633 | | 2019 | 1,774 | | 2018 | 1,970 | | 2017 | 2,207 | | 2016 | 2,437 | | 2015 | 2,635 | | 2014 | 2,814 | | 2013 | 2,932 | | 2012 | 2,966 | | 2011 | 2,930 | | 2010 | 2,855 | | 2009 | 2,794 | | 2008 | 2,753 | | 2007 | 2,711 | | 2006 | 2,657 | | 2005 | 2,584 | | 2004 | 2,494 | | 2003 | 2,397 | | 2002 | 2,303 | | 2001 | 2,216 | | 2000 | 2,140 | | 1999 | 2,073 | | 1998 | 2,021 | | 1997 | 1,984 | | 1996 | 1,962 | | 1995 | 1,955 | | 1994 | 1,961 | | 1993 | 1,983 | | 1992 | 2,017 | | 1991 | 2,040 | | 1990 | 2,042 | | 1989 | 1,995 | | 1988 | 1,908 | | 1987 | 1,800 | | 1986 | 1,694 | | 1985 | 1,608 | | 1984 | 1,532 | | 1983 | 1,470 | | 1982 | 1,426 | | 1981 | 1,397 | | 1980 | 1,365 | | 1979 | 1,340 | | 1978 | 1,303 | | 1977 | 1,259 | | 1976 | 1,214 | | 1975 | 1,164 |
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