Year % of commercial profits 2005 32.3 2006 32.1 2007 32.1 2008 32.1 2009 32.1 2010 19.5 2011 19.8 2012 19.8 2013 19.8 2014 20 2015 20 2016 19.4 2017 19.4 2018 19.4 2019 19.4