Year | Value | 2022 | 0.73479405766251 | 2021 | 0.84418167703331 | 2020 | 0.90629923485203 | 2019 | 0.90449121490461 | 2018 | 0.93284003198442 | 2017 | 0.96871995933843 | 2016 | 1.0092266326831 | 2015 | 1.0422709461054 | 2014 | 1.0663987653597 | 2013 | 1.0763795319002 | 2012 | 1.0720132221328 | 2011 | 1.0674934226997 | 2010 | 1.067429766584 | 2009 | 1.0293921162389 | 2008 | 0.98025485753593 | 2007 | 0.96076781166711 | 2006 | 0.96916926603715 | 2005 | 1.004361803532 | 2004 | 1.0201163454303 | 2003 | 1.0282925532591 | 2002 | 1.0277175875332 | 2001 | 1.0283941011157 | 2000 | 1.1168673737867 | 1999 | 1.2821757618859 | 1998 | 1.39677414492 | 1997 | 1.4730303421621 | 1996 | 1.5969318816172 | 1995 | 1.7202958163339 | 1994 | 1.8440181805139 | 1993 | 1.968859404024 | 1992 | 2.0702182464361 | 1991 | 2.1383112051217 | 1990 | 2.1851046292139 | 1989 | 2.2067370311388 | 1988 | 2.2212105565821 | 1987 | 2.2764946641556 | 1986 | 2.3297192013621 | 1985 | 2.3761423613326 | 1984 | 2.4181380440485 | 1983 | 2.4490694134961 | 1982 | 2.4598231878296 | 1981 | 2.4470038572269 | 1980 | 2.1697124033267 | 1979 | 2.2041263413494 | 1978 | 2.5636901957467 | 1977 | 2.571477717469 | 1976 | 2.5102063873586 | 1975 | 2.3064173923254 | 1974 | 2.2193161842054 | 1973 | 2.2192171064736 | 1972 | 2.2792161043831 | 1971 | 2.3285146407345 | 1970 | 2.2015167215636 | 1969 | 2.1453894381843 | 1968 | 2.1724292390629 | 1967 | 2.3030375105095 | 1966 | 2.431447096647 | 1965 | 2.5872557883525 | 1964 | 2.7278065896026 | 1963 | 2.8344154692507 | 1962 | 2.6761052514436 | 1961 | 2.7240604070952 |
|