| Year | Value | | 2022 | 70.488772282759 | | 2021 | 80.369886268224 | | 2020 | 91.223210502269 | | 2019 | 72.703878577082 | | 2018 | 71.650570248106 | | 2017 | 66.727247847215 | | 2016 | 66.907160912506 | | 2015 | 53.278587473717 | | 2014 | 47.976169516046 | | 2013 | 67.102911945643 | | 2012 | 65.227695883164 | | 2011 | 62.860132822205 | | 2010 | 72.452669926111 | | 2009 | 68.999003337494 | | 2008 | 65.245080305695 | | 2003 | 52.535419533379 | | 2000 | 17.70902168023 | | 1999 | 19.065350870407 | | 1998 | 5.4039154911214 |
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