Year % of commercial profits 2005 30.6 2006 31.3 2007 31.3 2008 28.4 2009 23.2 2010 23.2 2011 23.2 2012 23.2 2013 20.4 2014 19.9 2015 19.5 2016 17 2017 23.3 2018 16.8 2019 14.6