Year % of commercial profits 2005 11.2 2006 10 2007 9.5 2008 9 2009 8.4 2010 8.3 2011 8.3 2012 8.3 2013 8.2 2014 8.2 2015 8.2 2016 7.8 2017 7.8 2018 7.8 2019 7.7