Year	% of total secondary
1998	41.4455718994141
1999	40.8229484558105
2000	39.6041717529297
2001	38.423210144043
2002	36.9925193786621
2003	35.853630065918
2004	34.3354797363281
2005	33.2864189147949
2006	32.3608818054199
2007	32.2327499389648
2008	31.9443302154541
2009	31.9087009429932
2010	31.6686096191406
2011	31.5478992462158
2012	31.3941993713379
2013	31.1351509094238
2014	31.0445499420166
2015	31.2289695739746
2016	31.469690322876
2017	31.2680206298828
2018	30.751989364624
2019	30.2148303985596
2020	29.5386009216309
2021	28.9187698364258
2022	28.4426898956299