Year	% of profit
2005	42.5
2006	42.5
2007	42.6
2008	42.5
2009	46.7
2010	46.7
2011	44.3
2012	44.3
2013	47.3
2014	47.3
2015	48.1
2016	48.1
2017	47.2
2018	47.2
2019	47.2