Year	% of total primary
1999	24.8385906219482
2002	24.1292705535889
2009	19.8380603790283
2011	18.4179706573486
2015	17.5084991455078
2016	13.6884498596191
2019	19.2286396026611
2020	19.7145404815674
2021	19.3738403320312
2022	20.0164108276367