Year	% of profit
2005	49.5
2006	47.7
2007	47.8
2008	47.8
2009	47.7
2010	40.8
2011	39.1
2012	40.6
2013	39.9
2014	40.1
2015	37.9
2016	38.1
2017	38.4
2018	37.3
2019	36.6