Year	% of total primary
2000	16.5300006866455
2001	16.5300006866455
2002	15.3531904220581
2003	17.0443305969238
2014	34.9645385742188
2015	34.7806282043457
2016	33.4191017150879
2017	35.2080917358398
2018	43.3287887573242
2019	43.7742881774902
2020	45.1203918457031