Year	% of total secondary
1999	31.4168796539307
2000	31.5193405151367
2001	31.5232105255127
2002	31.0389499664307
2003	31.2987899780273
2004	31.3943195343018
2005	32.1100006103516
2006	32.7184295654297
2007	33.4735717773438
2008	33.799991607666
2009	34.5054588317871
2010	35.3577003479004
2011	36.0156784057617
2012	36.4734916687012
2013	37.0663909912109
2014	39.3229217529297
2015	39.4827117919922
2016	39.7609214782715
2017	39.4785995483398
2018	39.7312889099121
2019	39.891429901123
2020	39.7301712036133
2021	39.7060813903809