Year % of commercial profits 2005 2.1 2006 2.1 2007 2.1 2008 2.1 2009 2.1 2010 2.1 2011 2.1 2012 2.1 2013 1 2014 1 2015 1 2016 1 2017 1.8 2018 1.8 2019 1.8