Year % of commercial profits 2005 18.111999999999995 2006 17.29423076923077 2007 16.283636363636365 2008 16.073214285714283 2009 15.237499999999999 2010 14.77321428571429 2011 14.3448275862069 2012 13.869491525423731 2013 14.661290322580653 2014 14.914516129032256 2015 14.412903225806447 2016 14.387096774193546 2017 14.385483870967741 2018 14.163492063492061 2019 14.142857142857144