Year % of commercial profits 2005 12.6 2006 12.6 2007 12.6 2008 12.6 2009 12.6 2010 14.4 2011 14.4 2012 14.4 2013 13.5 2014 13.5 2015 13.5 2016 13.4 2017 13.4 2018 13.4 2019 13.4