| Year | Value | | 2021 | 22.764200792602 | | 2020 | 22.764200792602 | | 2019 | 22.764200792602 | | 2018 | 22.764200792602 | | 2017 | 22.764200792602 | | 2016 | 22.764200792602 | | 2015 | 22.764200792602 | | 2014 | 22.767965653897 | | 2013 | 22.771730515191 | | 2012 | 22.775495376486 | | 2011 | 22.779260237781 | | 2010 | 22.783025099075 | | 2009 | 22.708487450462 | | 2008 | 22.633949801849 | | 2007 | 22.559412153237 | | 2006 | 22.484874504624 | | 2005 | 22.410336856011 | | 2004 | 22.335799207398 | | 2003 | 22.261261558785 | | 2002 | 22.186723910172 | | 2001 | 22.112186261559 | | 2000 | 22.037648612946 |
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