Year	% of profit
2005	54
2006	49.5
2007	48.9
2008	46.7
2009	46.7
2010	46.7
2011	45.9
2012	44.1
2013	44
2014	50.7
2015	49.6
2016	50.7
2017	51.7
2018	51.9
2019	51.9