序号	1 To 20records	21 To 40records	41 To 60records	61 To 80records	81 To 100records	average
1	-2.31	6.94	14.20	7.02	-0.58	5.05
2	0.73	-3.69	14.81	6.89	1.01	3.95
3	1.31	6.23	-3.24	18.30	0.39	4.60
4	5.44	1.96	5.78	17.59	2.31	6.61
5	-2.36	24.35	-1.61	17.24	-11.38	5.25
6	3.49	2.05	4.55	6.69	18.42	7.04
7	1.59	11.57	-6.62	21.33	30.55	11.68
8	-0.14	-1.68	11.81	32.37	10.05	10.48
9	26.36	-3.29	0.76	16.39	-11.45	5.75
10	14.04	-13.01	2.38	27.05	2.55	6.60
11	2.63	28.39	-3.09	-1.49	3.08	5.91
12	19.21	7.22	-7.26	4.06	-6.39	3.37
13	3.37	1.57	-2.55	4.27	-14.34	-1.54
14	1.84	5.67	7.22	24.35	-4.78	6.86
15	8.45	46.88	-5.93	50.96	22.22	24.52
16	8.59	-4.04	3.19	10.48	-6.20	2.41
17	-7.44	1.31	-1.46	-5.78	0.69	-2.54
18	2.06	5.91	77.96	2.29	-11.28	15.39
19	-4.85	5.34	-0.93	12.12	8.97	4.13
20	22.79	-10.00	-2.29	1.24	10.63	4.48