Year % of commercial profits 2005 23.8 2006 23.8 2007 23.8 2008 23.8 2009 23.8 2010 23.8 2011 23.8 2012 23.8 2013 23.8 2014 23.8 2015 23.8 2016 23.8 2017 22.7 2018 22.8 2019 22.8