Year	% of lower secondary school age
1972	17.6406307220459
1973	18.3904399871826
1974	17.661039352417
1975	17.6386299133301
1976	16.5810508728027
1977	12.83314037323
1978	13.4715995788574
1982	13.4082899093628
1983	14.4295997619629
1984	13.5032196044922
1986	15.4985799789429
1987	12.6279001235962
1988	26.2255897521973
1999	4.82956981658936
2000	3.95410990715027
2001	15.3652601242065
2002	15.4153203964233
2003	15.8431596755981
2004	15.5894899368286
2005	6.29231023788452
2006	5.53914022445679
2007	5.95795011520386
2008	5.4824800491333
2010	3.79815006256104
2011	2.34809994697571
2012	1.81262004375458
2013	3.93493008613586
2014	3.28783988952637
2015	4.23313999176025
2016	3.16200995445251
2017	4.29525995254517
2018	3.88095998764038
2019	3.87142992019653
2020	4.42357015609741
2021	3.94481992721558