Year	% of total secondary
1999	27.5782909393311
2000	28.5739803314209
2001	29.0796699523926
2002	29.4171104431152
2003	29.3556594848633
2004	29.092529296875
2005	28.2009601593018
2006	28.2388801574707
2007	28.2197608947754
2008	28.555269241333
2009	28.662260055542
2010	27.6752490997314
2011	27.3086795806885
2012	26.9436092376709
2013	27.1530494689941
2014	27.3974990844727
2015	28.4241104125977
2016	29.1711502075195
2017	29.760929107666
2018	30.2325801849365
2019	30.3359508514404
2020	29.711799621582
2021	31.0879497528076