Year % of commercial profits 2006 4.2 2007 4.2 2008 4.2 2009 3.8 2010 3.7 2011 3.7 2012 0.7 2013 0.7 2014 0.7 2015 0.7 2016 0.7 2017 0.5 2018 0.5 2019 0.5