Year	% of total secondary
1998	27.971399307251
2000	32.0934600830078
2001	36.6983184814453
2006	28.1963901519775
2007	26.9753608703613
2008	29.4189605712891
2011	25.4420700073242
2012	26.463830947876
2013	26.9514408111572
2014	27.6757507324219
2015	28.0352802276611
2016	28.2598304748535
2021	28.4299392700195
2022	30.105640411377