Year	% of total secondary
1999	45.6333885192871
2000	45.7209281921387
2001	46.001651763916
2002	45.5620994567871
2003	45.2699089050293
2004	45.1260185241699
2005	45.337329864502
2006	45.8927383422852
2007	46.1884613037109
2008	46.1772918701172
2009	46.8980407714844
2010	47.231128692627
2011	47.5768089294434
2012	48.0958290100098
2013	48.833309173584
2014	50.8535804748535
2015	51.0210189819336
2016	51.4503288269043
2017	51.2714385986328
2018	51.5239410400391
2019	52.0392417907715
2020	51.6918601989746
2021	51.594970703125