Year | Value | 2022 | 25.122570341323 | 2021 | 24.788571415297 | 2020 | 24.558210050601 | 2019 | 24.573899677506 | 2018 | 24.314410944617 | 2017 | 24.135408494307 | 2016 | 24.067079136371 | 2015 | 24.058196518679 | 2014 | 24.029055675336 | 2013 | 24.182858057033 | 2012 | 24.226680788621 | 2011 | 24.239559334162 | 2010 | 24.513838471482 | 2009 | 24.231622814814 | 2008 | 24.138272093368 | 2007 | 24.103245135064 | 2006 | 24.119531937071 | 2005 | 24.312449417901 | 2004 | 24.308845227926 | 2003 | 24.038720325279 | 2002 | 23.857756146835 | 2001 | 23.852456311549 | 2000 | 23.569268852467 | 1999 | 23.355578418327 | 1998 | 23.21472239421 | 1997 | 23.144179897734 | 1996 | 23.143384191401 | 1995 | 23.159271320403 | 1994 | 23.212304069468 | 1993 | 23.279107979797 | 1992 | 23.278438174602 | 1991 | 23.260140326557 |
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