Year	% of profit
2005	58.6
2006	56.9
2007	46.3
2008	50
2009	44
2010	40.6
2011	38.7
2012	38.8
2013	31.7
2014	31.6
2015	36.9
2016	36.9
2017	37.3
2018	37.3
2019	36.6