Year	% of profit
2005	20.1
2006	20.1
2007	15.9
2008	14.2
2009	14.2
2010	14.2
2011	14
2012	13.8
2013	13.6
2014	13.6
2015	13.6
2016	13.6
2017	13.6
2018	13.6
2019	13.6