Year | Value | 2022 | 28.838 | 2021 | 28.77 | 2020 | 24.339 | 2019 | 25.538 | 2018 | 24.218 | 2017 | 23.992 | 2016 | 24.023 | 2015 | 22.869 | 2014 | 22.606 | 2013 | 22.038 | 2012 | 21.786 | 2011 | 21.416 | 2010 | 23.181 | 2009 | 20.512 | 2008 | 19.507 | 2007 | 22.326 | 2006 | 22.616 | 2005 | 23.84 | 2004 | 24.673 | 2003 | 27.116 | 2002 | 27.18 | 2001 | 25.371 | 2000 | 29.88 | 1999 | 25.37 | 1998 | 25 |
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