Year	% of profit
2005	47.9
2006	47.9
2007	47.9
2008	47.9
2009	47.9
2010	46.7
2011	46.6
2012	46.6
2013	46.5
2014	41.1
2015	35.3
2016	33.1
2017	33.1
2018	35.1
2019	35.1