group	dept	year	size	count
1	a	1	large	2
2	a	1	small	0
3	a	2	large	9
4	a	2	small	1
5	a	3	large	5
6	a	3	small	15
7	a	4	large	4
8	a	4	small	16
9	b	1	large	18
10	b	1	small	2
11	b	2	large	40
12	b	2	small	10
13	b	3	large	4
14	b	3	small	16
15	b	4	large	2
16	b	4	small	14