Year % of commercial profits 2005 37.2 2006 35 2007 28.2 2008 27.1 2009 27.1 2010 27.1 2011 28.2 2012 28.2 2013 28.2 2014 28.2 2015 28.2 2016 24.9 2017 24.9 2018 17.4 2019 17.4