Year % of commercial profits 2005 25.2 2006 25.2 2007 25.2 2008 25.2 2009 25.2 2010 25.2 2011 26.7 2012 28.7 2013 30.7 2014 29.9 2015 31.3 2016 31.3 2017 31.3 2018 31.2 2019 29.2