Year	% of profit
2005	45.3
2006	45
2007	45
2008	47.1
2009	42.8
2010	42
2011	41.2
2012	39.8
2013	38.9
2014	38.1
2015	38.1
2016	38.1
2017	38.1
2018	38.3
2019	38.3