Year % of profit 2005 71.90454545454544 2006 73.72222222222223 2007 72.96888888888888 2008 72.30000000000001 2009 71.69777777777777 2010 69.08000000000001 2011 58.3577777777778 2012 57.445652173913054 2013 49.968085106382986 2014 45.51702127659574 2015 45.76382978723404 2016 46.56595744680851 2017 46.53404255319149 2018 46.714893617021275 2019 47.268085106382976