Year % of commercial profits 2005 37.5 2006 37.5 2007 34.4 2008 34.2 2009 34.2 2010 32.3 2011 31.8 2012 31.5 2013 31.5 2014 31.5 2015 30 2016 25.8 2017 25.8 2018 25.8 2019 3.4