Year	% of total primary
2008	13.296799659729
2009	13.0681600570679
2010	13.4832201004028
2011	13.4464197158813
2012	13.5309600830078
2013	13.141960144043
2014	12.9076204299927
2015	12.5989999771118
2016	12.4759702682495
2017	12.6375999450684
2018	12.9016304016113
2019	12.8467102050781