序号	1 To 15records	16 To 30records	31 To 45records	46 To 60records	61 To 75records	average
1	8.12	-14.14	7.14	9.80	-2.80	1.62
2	-17.57	-7.79	-24.24	-14.73	1.77	-12.51
3	-5.56	-4.84	-28.55	43.79	-0.25	0.92
4	3.10	-0.83	0.00	30.65	-3.37	5.91
5	9.47	-6.77	40.02	-2.43	5.02	9.06
6	8.59	12.68	34.41	3.41	0.93	12.01
7	40.32	-19.01	3.17	1.40	-1.21	4.94
8	-16.86	10.29	-0.29	-13.33	7.59	-2.52
9	-4.76	-14.96	-0.30	17.82	-1.73	-0.79
10	-6.29	-10.28	16.81	10.06	3.45	2.75
11	7.36	-2.65	-2.23	-19.06	2.70	-2.78
12	30.76	1.92	0.12	14.04	-0.12	9.34
13	-4.68	8.00	-7.15	-0.81	-14.73	-3.87
14	-2.75	3.68	6.97	-7.78	3.73	0.77
15	-5.81	-0.08	13.09	29.76	-0.25	7.34