Year % of profit 2005 50.3 2006 45.5 2007 45.5 2008 45.5 2009 45.5 2010 45.5 2011 45.5 2012 45.5 2013 45.3 2014 45.1 2015 47.3 2016 45.1 2017 45.1 2018 45.1 2019 44.8