Year % of commercial profits 2005 25.9 2006 25.9 2007 25.9 2008 25.9 2009 25.9 2010 25.9 2011 26 2012 26 2013 26.1 2014 26.1 2015 26.1 2016 24.4 2017 21.8 2018 21.8 2019 21.8