Year % of commercial profits 2005 18.349056603773583 2006 17.47037037037037 2007 17.168518518518514 2008 17.03333333333333 2009 16.803636363636365 2010 16.323636363636368 2011 16.152727272727276 2012 16.322807017543862 2013 16.168965517241375 2014 16.182758620689654 2015 16.425862068965515 2016 16.405172413793103 2017 16.389655172413793 2018 16.298275862068962 2019 16.31724137931034