Year % of commercial profits 2005 3 2006 3 2007 3 2008 1.4 2009 1.4 2010 1.4 2011 1.4 2012 1.4 2013 1.3 2014 1.3 2015 1.3 2016 1.3 2017 1.3 2018 1.3 2019 1.3