Year	% of profit
2005	32.5
2006	32.5
2007	32.8
2008	34.1
2009	32.5
2010	31.7
2011	31.5
2012	31.5
2013	29.9
2014	29.9
2015	29.9
2016	29.9
2017	30
2018	37
2019	41.8