Year	% of profit
2005	40.93333333333333
2006	40.32222222222222
2007	40.459999999999994
2008	40.06
2009	39.4
2010	39.13
2011	38.69090909090908
2012	38.62727272727272
2013	38.38181818181818
2014	37.627272727272725
2015	37.06363636363636
2016	36.9
2017	36.79090909090909
2018	36.66363636363636
2019	36.709090909090904