Year % of commercial profits 2005 15.5 2006 15.5 2007 15.5 2008 15.5 2009 15.5 2010 15.5 2011 15.5 2012 18.8 2013 18.8 2014 18.8 2015 18.8 2016 18.8 2017 18.8 2018 18.8 2019 18.8