Year % of commercial profits 2005 32.8 2006 32.8 2007 32.8 2008 32.8 2009 32.8 2010 32.8 2011 32.8 2012 32.2 2013 32.3 2014 30.5 2015 30.5 2016 30.5 2017 30.5 2018 30.5 2019 30.5