YEAR	Level	EM & DMS	ALgo	CDS	OS	DBMS	CO	CN & IS	TOC	CD	DLD	SE  & UML	WT	Mp	CG	others(Oops & fuzzy & NN)
2020	Easy	1	2	0	8	1	5	3	2	5	1	2	0	0	0	0
	Medium	4	5	8	2	2	3	2	3	2	7	2	0	0	0	0
	Difficult	0	0	5	1	0	4	0	0	0	1	1	0	0	0	0
2018	Easy	3	4	3	3	6	2	4	4	4	1	2	1	0	0	1
	Medium	1	5	3	4	3	3	3	0	1	4	1	0	0	0	0
	Difficult	0	0	3	3	0	0	0	0	1	0	1	0	0	1	1
2017(Dec)	Easy	3	2	8	4	1	1	3	1	0	2	1	0	0	0	0
	Medium	6	5	6	6	3	2	6	7	0	2	0	0	0	0	0
	Difficult	3	0	0	0	2	2	0	0	1	2	0	0	0	0	1
2017(May)	Easy	3	5	8	7	3	2	12	2	1	4	8	2	1	0	0
	Medium	2	1	5	4	2	0	1	1	0	0	1	0	0	0	0
	Difficult	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
2016	Easy	2	1	2	5	2	3	4	4	3	9	4	1	0	0	0
	Medium	1	2	3	5	5	0	4	3	0	3	0	0	0	0	0
	Difficult	0	0	0	0	0	1	1	0	0	0	2	0	0	0	0
2015	Easy	1	1	6	7	4	1	7	0	3	6	1	3	0	0	1
	Medium	0	5	7	1	2	2	4	0	2	4	1	0	0	0	0
	Difficult	0	0	0	1	2	0	1	0	0	0	0	0	1	0	1
2014	Easy	0	1	4	3	2	0	7	1	1	1	2	0	0	1	1
	Medium	8	1	5	4	3	5	3	6	0	5	0	0	0	0	0
	Difficult	1	0	1	2	1	0	2	0	0	2	2	0	0	1	0
2013	Easy	2	1	2	4	3	0	7	0	1	3	3	0	0	1	1
	Medium	4	1	2	6	2	3	4	1	0	5	1	0	3	1	1
	Difficult	0	0	3	3	1	2	1	0	1	2	0	0	1	1	0
2011	Easy	4	2	1	4	2	3	3	0	1	2	3	1	1	0	0
	Medium	4	1	4	6	1	4	5	3	1	5	2	0	1	2	1
	Difficult	1	0	0	1	1	1	1	0	0	1	0	0	1	2	1
2009	Easy	6	0	1	7	3	3	6	0	0	3	2	0	0	0	0
	Medium	8	1	3	3	2	5	2	0	2	3	0	0	0	0	1
	Difficult	6	0	2	2	0	3	0	0	0	0	0	0	1	0	1
2008	Easy	1	1	3	15	2	5	8	0	2	2	0	0	1	0	0
	Medium	4	1	5	3	1	1	1	1	2	11	0	0	1	0	0
	Difficult	0	0	2	1	0	0	0	0	0	0	0	0	1	0	0
2007	Easy	3	3	2	11	7	2	12	0	0	4	6	0	0	2	0
	Medium	3	0	2	4	1	0	3	0	0	7	7	0	0	1	1
	Difficult	1	1	0	2	0	0	0	0	0	2	0	0	0	0	0