Year	% of profit
2005	35.5
2006	35.8
2007	39.5
2008	35.2
2009	38.4
2010	40.1
2011	41.2
2012	43.4
2013	43.5
2014	43.5
2015	43.5
2016	42.4
2017	48.8
2018	48.8
2019	48.8