Year	% of profit
2005	51.5
2006	47.6
2007	46.2
2008	46.2
2009	41
2010	41
2011	41
2012	41
2013	40.9
2014	41.6
2015	41.9
2016	41.9
2017	41.9
2018	42.8
2019	43