序号	1 To 15records	16 To 30records	31 To 45records	46 To 60records	61 To 75records	average
1	12.94	5.51	-11.56	3.53	6.22	3.33
2	15.50	5.57	37.09	15.56	22.96	19.34
3	2.66	14.09	10.98	5.17	1.78	6.93
4	9.04	3.16	5.63	1.79	3.91	4.70
5	9.39	6.97	6.11	2.24	5.71	6.09
6	2.92	24.39	18.56	9.16	1.03	11.21
7	-5.86	-31.77	1.68	-2.88	8.71	-6.02
8	4.48	-8.22	1.36	-3.06	17.44	2.40
9	6.24	32.57	24.39	17.88	20.98	20.41
10	1.11	-11.84	3.28	1.37	7.82	0.35
11	5.35	5.66	-14.85	-5.06	-19.13	-5.61
12	-23.64	4.17	10.08	-24.49	12.35	-4.31
13	18.96	21.48	0.61	57.23	37.90	27.24
14	14.74	5.70	1.05	2.83	18.67	8.60
15	8.82	-5.69	1.51	0.28	-16.34	-2.28