Year % of commercial profits 2005 19.137735849056604 2006 18.59811320754717 2007 17.69074074074074 2008 17.324074074074076 2009 17.314814814814824 2010 17.28518518518519 2011 16.45740740740741 2012 17.167857142857148 2013 17.800000000000008 2014 18.03114754098361 2015 18.016393442622956 2016 17.877049180327866 2017 17.88360655737705 2018 17.849180327868854 2019 17.67704918032787