Year	% of total secondary
1999	0.813090026378632
2003	1.78742003440857
2007	2.07483005523682
2008	2.50558996200562
2009	2.46327996253967
2010	6.2348198890686
2011	8.70580005645752
2012	7.93400001525879
2020	8.98600959777832
2021	8.3989896774292