Year % of commercial profits 2005 13.049999999999999 2006 13.089285714285712 2007 13.164285714285713 2008 13.435714285714285 2009 13.828571428571431 2010 13.85357142857143 2011 13.686206896551727 2012 13.524137931034485 2013 14.761290322580649 2014 14.929032258064519 2015 14.638709677419355 2016 14.680645161290325 2017 14.725806451612906 2018 14.841935483870966 2019 15.103225806451615