Year	% of profit
2005	37.84166666666667
2006	37.544000000000004
2007	37.651999999999994
2008	36.716
2009	34.58800000000001
2010	33.528
2011	33.768
2012	33.61153846153846
2013	35.0551724137931
2014	34.87241379310344
2015	34.50689655172413
2016	34.703448275862065
2017	34.49999999999999
2018	34.406896551724145
2019	34.53103448275863