Year % of commercial profits 2005 26.4 2006 26.4 2007 26.4 2008 26.4 2009 26.4 2010 26.4 2011 26.4 2012 26.6 2013 25.8 2014 25.4 2015 24.9 2016 24.6 2017 24.6 2018 24.6 2019 24.6