Year | Value | 2022 | 0.9861120537188 | 2021 | 1.225660252096 | 2020 | 1.4514024008423 | 2019 | 1.9097256080788 | 2018 | 1.8758216402053 | 2017 | 1.5069461850761 | 2016 | 1.3612254377523 | 2015 | 1.1722306639687 | 2014 | 1.0436511278963 | 2013 | 0.96748622026565 | 2012 | 0.9180559085911 | 2011 | 0.84538211588871 | 2010 | 0.75635720297509 | 2009 | 0.70272434662364 | 2008 | 0.71698718265843 | 2007 | 0.76975936961609 | 2006 | 0.82723926679274 | 2005 | 0.90418415576071 | 2004 | 0.97473175451507 | 2003 | 1.0511353372453 | 2002 | 1.1760851572116 | 2001 | 1.3433195446069 | 2000 | 1.5204422707009 | 1999 | 1.6670604009319 | 1998 | 1.7695187906283 | 1997 | 1.822439493251 | 1996 | 1.8569528922994 | 1995 | 1.9235561277044 | 1994 | 1.9765033444167 | 1993 | 2.0044600455918 | 1992 | 2.0348693168352 | 1991 | 2.1208433274188 | 1990 | 2.2171052208836 | 1989 | 2.2471520024788 | 1988 | 2.2597503645291 | 1987 | 2.2648976895319 | 1986 | 2.3118359428563 | 1985 | 2.3620742408617 | 1984 | 2.4074071735443 | 1983 | 2.4330149256554 | 1982 | 2.4350857952497 | 1981 | 2.4839165799736 | 1980 | 2.5078075536898 | 1979 | 2.4970683288076 | 1978 | 2.5188674841337 | 1977 | 2.4823883196636 | 1976 | 2.4647031173675 | 1975 | 2.5203874080726 | 1974 | 2.5723906934301 | 1973 | 2.6400198600197 | 1972 | 2.6981039363206 | 1971 | 2.5450357142117 | 1970 | 2.6041998100498 | 1969 | 2.8438817997775 | 1968 | 2.8560660720418 | 1967 | 2.8741638554598 | 1966 | 2.8978624617088 | 1965 | 2.9220277654248 | 1964 | 2.9231653216309 | 1963 | 2.927161985058 | 1962 | 2.9526846025309 | 1961 | 2.962778566473 |
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