Year	% of total secondary
1999	10.0079298019409
2000	9.98948001861572
2001	10.5627098083496
2002	11.0644903182983
2003	11.8032503128052
2004	12.7932596206665
2005	13.4664697647095
2006	13.9784297943115
2007	14.3832998275757
2008	15.7513198852539
2009	17.0779304504395
2010	17.4813899993896
2011	17.9095001220703
2012	18.1453399658203
2013	17.8145503997803
2014	17.2442607879639
2015	17.5014400482178
2016	17.8169498443604
2017	18.1391696929932
2018	18.6460704803467
2019	19.2507991790771
2020	19.9098701477051
2021	20.1731491088867