Year % of commercial profits 2005 15.255555555555556 2006 15.300000000000002 2007 15.145000000000001 2008 15.155000000000001 2009 15.23 2010 15.205000000000002 2011 15.27 2012 15.071428571428575 2013 14.752380952380953 2014 15.123809523809527 2015 15.223809523809528 2016 15.338095238095242 2017 15.538095238095242 2018 15.671428571428573 2019 15.533333333333335