size	number	percentage of the total overlap number
1	0	0.00
2	0	0.00
3	0	0.00
4	0	0.00
5	0	0.00
6	0	0.00
7	0	0.00
8	1	12.50
9	0	0.00
10	1	12.50
11	0	0.00
12	1	12.50
13	0	0.00
14	0	0.00
15	1	12.50
16	1	12.50
17	0	0.00
18	1	12.50
19	2	25.00
20	0	0.00
21	0	0.00
22	0	0.00
23	0	0.00
