Year	% of profit
2005	57.2
2006	51.1
2007	51.1
2008	51.1
2009	51.6
2010	51.3
2011	50.8
2012	52.3
2013	51.9
2014	51.7
2015	51.7
2016	51.6
2017	51.8
2018	51.5
2019	51.4