Year % of commercial profits 2005 27.2 2006 27.2 2007 27.2 2008 27.2 2009 27.2 2010 27.2 2011 27.2 2012 27.3 2013 27.2 2014 27.2 2015 26.6 2016 26.6 2017 26.6 2018 26.6 2019 27.2