Year	% of total secondary
1999	13.1886701583862
2000	14.2978801727295
2001	15.224760055542
2002	14.8574600219727
2003	15.208459854126
2004	15.504469871521
2005	15.8852701187134
2006	16.5182304382324
2008	18.5953693389893
2009	19.8580093383789
2010	21.2490100860596
2011	22.2729892730713
2012	23.1582508087158
2013	23.2991199493408
2014	24.2962703704834
2015	25.196310043335
2016	25.6841506958008
2017	25.7691898345947
2018	25.5548992156982
2019	26.1178607940674
2022	25.9628105163574