Year % of commercial profits 2005 29.4 2006 29.6 2007 29.7 2008 29.7 2009 29.6 2010 23.9 2011 24.2 2012 24.4 2013 24.5 2014 24.2 2015 24.8 2016 25.1 2017 25.4 2018 23.9 2019 23