Year	% of profit
2005	33.4
2006	33.4
2007	33
2008	32.2
2009	26.3
2010	25.9
2011	29
2012	32.4
2013	33.5
2014	35.2
2015	34.5
2016	34.5
2017	34.5
2018	34.5
2019	34.5