Year % of commercial profits 2005 19.2 2006 19.2 2007 19.2 2008 19.2 2009 19.2 2010 19.2 2011 20.3 2012 20.3 2013 20.3 2014 20.3 2015 21.4 2016 22.6 2017 23.1 2018 23.7 2019 23.7