Year	% of profit
2005	30.1
2006	30.2
2007	49.3
2008	66.3
2009	36.1
2010	38.2
2011	33.5
2012	33.4
2013	34.1
2014	31.4
2015	31.6
2016	31.6
2017	31.6
2018	31.6
2019	31.6