Year | Value | 2023 | 3,287 | 2022 | 3,176 | 2021 | 3,023 | 2020 | 2,892 | 2019 | 2,902 | 2018 | 3,017 | 2017 | 3,158 | 2016 | 3,289 | 2015 | 3,374 | 2014 | 3,387 | 2013 | 3,319 | 2012 | 3,183 | 2011 | 3,006 | 2010 | 2,816 | 2009 | 2,729 | 2008 | 2,766 | 2007 | 2,813 | 2006 | 2,844 | 2005 | 2,844 | 2004 | 2,796 | 2003 | 2,720 | 2002 | 2,649 | 2001 | 2,597 | 2000 | 2,536 | 1999 | 2,520 | 1998 | 2,580 | 1997 | 2,626 | 1996 | 2,616 | 1995 | 2,527 | 1994 | 2,400 | 1993 | 2,279 | 1992 | 2,172 | 1991 | 2,040 | 1990 | 1,962 | 1989 | 2,055 | 1988 | 2,271 | 1987 | 2,532 | 1986 | 2,789 | 1985 | 2,999 | 1984 | 3,123 | 1983 | 3,175 | 1982 | 3,187 | 1981 | 3,191 | 1980 | 3,191 | 1979 | 3,182 | 1978 | 3,165 | 1977 | 3,119 | 1976 | 3,033 | 1975 | 2,908 | 1974 | 2,765 |
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