Year | Value | 2023 | 1,591 | 2022 | 1,612 | 2021 | 1,600 | 2020 | 1,570 | 2019 | 1,525 | 2018 | 1,467 | 2017 | 1,422 | 2016 | 1,389 | 2015 | 1,341 | 2014 | 1,299 | 2013 | 1,269 | 2012 | 1,227 | 2011 | 1,221 | 2010 | 1,237 | 2009 | 1,235 | 2008 | 1,214 | 2007 | 1,180 | 2006 | 1,134 | 2005 | 1,090 | 2004 | 1,056 | 2003 | 1,028 | 2002 | 1,015 | 2001 | 1,028 | 2000 | 1,051 | 1999 | 1,051 | 1998 | 1,026 | 1997 | 982 | 1996 | 926 | 1995 | 864 | 1994 | 806 | 1993 | 752 | 1992 | 701 | 1991 | 649 | 1990 | 600 | 1989 | 568 | 1988 | 544 | 1987 | 503 | 1986 | 460 | 1985 | 421 | 1984 | 377 | 1983 | 340 | 1982 | 314 | 1981 | 282 | 1980 | 250 | 1979 | 230 | 1978 | 210 | 1977 | 191 | 1976 | 180 | 1975 | 171 | 1974 | 160 |
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