Year | Value | 2022 | 49.74789901192 | 2021 | 49.750134130343 | 2020 | 49.746963253554 | 2019 | 49.74689722471 | 2018 | 49.750866219623 | 2017 | 49.75218199761 | 2016 | 49.750379662251 | 2015 | 49.750188766182 | 2014 | 49.755402158232 | 2013 | 49.764774286201 | 2012 | 49.775270435633 | 2011 | 49.785532665478 | 2010 | 49.79612222478 | 2009 | 49.81129867627 | 2008 | 49.834861181802 | 2007 | 49.858314079411 | 2006 | 49.880095095007 | 2005 | 49.901124930432 | 2004 | 49.916836925188 | 2003 | 49.930473293439 | 2002 | 49.943183097667 | 2001 | 49.955277049501 | 2000 | 49.965008258084 | 1999 | 49.974860701822 | 1998 | 49.99030797352 | 1997 | 50.004757175703 | 1996 | 50.017824817225 | 1995 | 50.0303686165 | 1994 | 50.037317126719 | 1993 | 50.037084633305 | 1992 | 50.032448062295 | 1991 | 50.025767105442 | 1990 | 50.018419817861 | 1989 | 50.013790418035 | 1988 | 50.017915239997 | 1987 | 50.023952823673 | 1986 | 50.025461835487 | 1985 | 50.027497635069 | 1984 | 50.031812654714 | 1983 | 50.036953622864 | 1982 | 50.040444477136 | 1981 | 50.045278161804 | 1980 | 50.051225693997 | 1979 | 50.05999041689 | 1978 | 50.071741655112 | 1977 | 50.081865205328 | 1976 | 50.091695664131 | 1975 | 50.110080480329 | 1974 | 50.120070500001 | 1973 | 50.117200620011 | 1972 | 50.117291717108 | 1971 | 50.160134366436 | 1970 | 50.203039668763 | 1969 | 50.202926563338 | 1968 | 50.204013479757 | 1967 | 50.20595357161 | 1966 | 50.209011682458 | 1965 | 50.212559550504 | 1964 | 50.216340861399 | 1963 | 50.220533674429 | 1962 | 50.224929271918 | 1961 | 50.230190568397 | 1960 | 50.236766121316 |
|