Year % of commercial profits 2005 23.4 2006 23.4 2007 23.4 2008 23.4 2009 23.4 2010 23.4 2011 23.4 2012 23.4 2013 24.3 2014 24.3 2015 24.3 2016 24.3 2017 24.3 2018 24.3 2019 24.3