Year	% of total secondary
1998	29.2626895904541
1999	29.4134197235107
2000	27.6004905700684
2001	26.2883701324463
2002	25.6413402557373
2003	19.8838901519775
2004	20.0933094024658
2005	21.0908908843994
2006	20.425479888916
2008	21.5408706665039
2009	21.6250896453857
2010	21.6221008300781
2011	21.5955905914307
2012	21.8021202087402
2016	21.0074100494385
2020	19.0462493896484
2021	18.5671005249023
2022	18.7244606018066