Year	% of total primary
1971	75.9998092651367
1972	75.9999465942383
1975	76.046989440918
1976	78.1943588256836
2001	1.68534004688263
2011	3.47307991981506
2012	4.89970016479492
2013	7.78950977325439
2015	4.38877010345459
2016	5.28748989105225
2017	5.56923007965088
2018	5.8744797706604
2019	5.3850998878479
2020	5.12828016281128
2021	6.54563999176025