Year	% of profit
2005	51.2
2006	47.6
2007	46.2
2008	45.6
2009	43.6
2010	45.1
2011	43.1
2012	43
2013	42.9
2014	42.4
2015	42.6
2016	42.6
2017	42.7
2018	42.6
2019	42.6