Year	% of total secondary
2000	12.9687404632568
2001	11.028980255127
2002	13.6296300888062
2003	13.437370300293
2004	13.4791698455811
2005	13.8981895446777
2006	14.1375303268433
2007	14.4080295562744
2008	14.5784301757812
2009	14.6281700134277
2010	14.5191297531128
2011	14.0181303024292
2012	13.9614095687866
2013	14.5752401351929
2014	15.1053495407104
2015	15.3108596801758
2016	15.8984699249268
2017	16.4797496795654
2018	16.6369094848633
2019	16.9015598297119
2020	17.17799949646