Year % of commercial profits 2005 19.864102564102563 2006 18.65 2007 18.397499999999994 2008 18.3725 2009 17.560000000000002 2010 17.097500000000004 2011 17.392500000000002 2012 17.873809523809527 2013 17.567441860465117 2014 17.24418604651163 2015 17.469767441860462 2016 17.420930232558135 2017 17.42325581395349 2018 17.365116279069763 2019 17.593023255813947