Year	% of profit
2005	45.453333333333326
2006	44.61249999999999
2007	43.53235294117646
2008	42.27714285714285
2009	40.79714285714285
2010	39.58857142857143
2011	39.45945945945946
2012	39.847368421052636
2013	39.4078947368421
2014	39.31842105263158
2015	38.88947368421052
2016	38.8421052631579
2017	38.78947368421054
2018	38.910526315789475
2019	39.160526315789475