Year	% of total primary
2010	21.6446399688721
2011	22.2930297851562
2012	22.7677001953125
2013	22.8745403289795
2014	22.9175205230713
2015	22.8683490753174
2016	22.9491405487061
2017	22.9782905578613
2018	23.2305908203125
2019	23.2538299560547
2020	23.5198593139648
2021	23.9023609161377