Year % of profit 2005 61.2 2006 61.2 2007 61.2 2008 59.1 2009 62.8 2010 62.8 2011 62.8 2012 62.8 2013 62.8 2014 62.8 2015 60.2 2016 60.2 2017 64.1 2018 60.2 2019 60.7