Year | Value | 2023 | 3,417 | 2022 | 3,448 | 2021 | 3,419 | 2020 | 3,330 | 2019 | 3,221 | 2018 | 3,124 | 2017 | 3,081 | 2016 | 3,101 | 2015 | 3,187 | 2014 | 3,317 | 2013 | 3,453 | 2012 | 3,551 | 2011 | 3,578 | 2010 | 3,485 | 2009 | 3,337 | 2008 | 3,241 | 2007 | 3,202 | 2006 | 3,214 | 2005 | 3,251 | 2004 | 3,260 | 2003 | 3,233 | 2002 | 3,195 | 2001 | 3,167 | 2000 | 3,095 | 1999 | 3,029 | 1998 | 3,014 | 1997 | 2,989 | 1996 | 2,948 | 1995 | 2,870 | 1994 | 2,752 | 1993 | 2,618 | 1992 | 2,494 | 1991 | 2,214 | 1990 | 1,886 | 1989 | 1,774 | 1988 | 1,841 | 1987 | 1,999 | 1986 | 2,170 | 1985 | 2,339 | 1984 | 2,515 | 1983 | 2,700 | 1982 | 2,892 | 1981 | 3,107 | 1980 | 3,297 | 1979 | 3,425 | 1978 | 3,531 | 1977 | 3,629 | 1976 | 3,703 | 1975 | 3,706 | 1974 | 3,640 |
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