Year % of commercial profits 2005 10.7 2006 10.7 2007 10.7 2008 10.7 2009 10.7 2010 10.7 2011 10.7 2012 12.4 2013 12.4 2014 12.8 2015 13 2016 13 2017 13 2018 13 2019 13