Year % of commercial profits 2005 2.4 2006 2.4 2007 2.4 2008 2.4 2009 2.6 2010 3 2011 2.9 2012 3.7 2013 3.1 2014 3 2015 2.7 2016 2.5 2017 2.8 2018 2.8 2019 2.8