Year	% of total secondary
1999	20.6180992126465
2000	20.4234294891357
2001	20.177619934082
2002	19.9412498474121
2003	20.1458301544189
2004	20.3516407012939
2005	20.9293804168701
2006	21.4273490905762
2007	22.33371925354
2008	22.7712097167969
2009	23.3225593566895
2010	23.9947700500488
2011	24.7232608795166
2012	25.3544692993164
2013	25.336389541626
2014	27.0029907226562
2015	27.270040512085
2016	27.7981796264648
2017	27.7686595916748
2018	28.2314891815186
2019	28.4560508728027
2020	28.4989891052246
2021	28.5216598510742
2022	28.4252891540527