Year | Value | 2022 | 24.168541822128 | 2021 | 23.794347306801 | 2020 | 22.723813383167 | 2019 | 24.763603743305 | 2018 | 23.910730302986 | 2017 | 24.078519724095 | 2016 | 21.876652923042 | 2015 | 22.520384194575 | 2014 | 18.00005114288 | 2013 | 17.203043822421 | 2012 | 15.514972799301 | 2011 | 16.932504298681 | 2010 | 17.844653140312 | 2009 | 17.397200149409 | 2008 | 18.799532298428 | 2007 | 20.323101504336 | 2006 | 20.302070894507 | 2005 | 18.797175880494 | 2004 | 19.946881913156 | 2003 | 18.111391482046 | 2002 | 17.473504749711 | 2001 | 18.263899920177 | 2000 | 17.808419561468 | 1999 | 14.975178654834 | 1998 | 17.36221333219 | 1997 | 15.594395190926 | 1996 | 16.856640105566 | 1995 | 11.47143215898 |
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