Year	% of total secondary
1998	3.38648009300232
1999	3.47949004173279
2000	3.53506994247437
2001	3.75764989852905
2002	4.09159994125366
2003	4.31310987472534
2004	3.0473198890686
2005	3.23939990997314
2006	3.487380027771
2007	3.8401300907135
2008	4.17747020721436
2009	4.56806993484497
2010	4.80713987350464
2011	4.95149993896484
2012	5.14695978164673
2013	8.63422966003418
2014	8.62574005126953
2015	8.49384021759033
2016	8.45742988586426
2017	8.63288974761963
2018	9.00953960418701
2019	9.13125038146973
2020	8.84893989562988
2021	9.23363018035889
2022	9.17012023925781