Year	% of profit
2005	46.4
2006	42.4
2007	40.9
2008	40.9
2009	40.9
2010	38.9
2011	40
2012	40
2013	39.8
2014	39.8
2015	39.8
2016	39.8
2017	39.8
2018	41.2
2019	40.7