Year	% of total secondary
1999	26.9040298461914
2000	27.4532604217529
2001	27.2656803131104
2003	27.0802993774414
2004	27.6147994995117
2006	29.2661094665527
2007	29.3726997375488
2008	29.4770698547363
2009	30.7599697113037
2010	31.515739440918
2012	33.8564300537109
2013	35.0648498535156
2014	36.3713798522949
2015	34.9760093688965