Year % of commercial profits 2005 19.593181818181815 2006 18.404444444444444 2007 17.859999999999996 2008 17.74666666666667 2009 17.842222222222222 2010 17.415555555555557 2011 17.86888888888889 2012 17.982608695652175 2013 18.074468085106382 2014 17.28510638297872 2015 17.597872340425532 2016 18.41914893617021 2017 18.4468085106383 2018 18.38723404255319 2019 18.470212765957445