| Year | Value | | 2021 | 61.486988847584 | | 2020 | 61.486988847584 | | 2019 | 61.486988847584 | | 2018 | 61.486988847584 | | 2017 | 61.486988847584 | | 2016 | 61.486988847584 | | 2015 | 61.486988847584 | | 2014 | 61.486988847584 | | 2013 | 61.486988847584 | | 2012 | 61.486988847584 | | 2011 | 61.486988847584 | | 2010 | 61.486988847584 | | 2009 | 59.992565055762 | | 2008 | 58.49814126394 | | 2007 | 57.003717472119 | | 2006 | 55.509293680297 |
|