序号	1 To 18records	19 To 36records	37 To 54records	55 To 72records	73 To 90records	average
1	3.95	6.04	11.20	2.12	3.10	5.28
2	15.01	7.66	-3.61	1.51	7.47	5.61
3	6.74	-14.29	1.25	3.92	2.01	-0.07
4	14.11	1.62	0.46	5.05	12.80	6.81
5	-14.62	4.47	1.54	4.05	9.39	0.97
6	1.24	7.56	1.36	-15.97	3.21	-0.52
7	10.91	17.84	2.00	4.56	3.95	7.85
8	-17.00	2.66	10.10	7.04	-32.06	-5.85
9	14.26	5.24	0.39	2.87	5.68	5.69
10	11.46	5.55	4.93	-4.93	8.09	5.02
11	14.78	11.20	31.07	2.60	17.30	15.39
12	3.21	9.25	16.23	-18.11	0.84	2.28
13	-19.24	0.00	1.05	22.69	5.04	1.91
14	2.16	-22.03	3.70	2.06	0.79	-2.66
15	-14.48	18.31	1.33	7.92	11.27	4.87
16	26.97	2.99	6.23	3.57	22.67	12.49
17	1.48	-23.44	3.69	4.21	1.92	-2.43
18	5.63	-9.32	7.81	-1.17	4.71	1.53