herd	clin	positive	negative
1	0	6	26
1	1	4	4
1	2	1	2
1	3	0	1
2	0	9	23
2	1	1	5
2	2	1	1
2	3	2	1
3	0	3	3
3	1	11	5
3	2	0	4
3	3	13	4
4	0	18	20
4	1	1	4
4	2	1	3
4	3	4	0
5	0	8	24
5	1	1	3
5	2	0	0
5	3	1	0
6	0	0	0
6	1	5	5
6	2	7	10
6	3	9	5
7	0	8	4
7	1	9	15
7	2	6	1
7	3	1	0
8	0	0	2
8	1	1	4
8	2	4	12
8	3	6	8
9	0	0	1
9	1	0	0
9	2	7	14
9	3	7	11
10	0	0	0
10	1	2	1
10	2	16	4
10	3	16	1