序号	1 To 18records	19 To 36records	37 To 54records	55 To 72records	73 To 90records	average
1	21.27	3.60	-2.25	3.00	33.15	11.75
2	6.61	-0.16	72.55	2.58	10.56	18.43
3	24.92	56.14	31.59	9.05	5.27	25.39
4	-20.15	7.38	37.75	62.74	41.59	25.86
5	12.33	-35.06	-3.43	-15.65	-2.89	-8.94
6	29.93	37.09	18.63	29.31	24.43	27.88
7	10.14	-3.36	10.13	133.66	22.11	34.54
8	6.13	-3.73	2.51	1.12	-0.35	1.13
9	28.76	21.29	3.15	52.80	15.59	24.32
10	14.49	4.90	9.12	5.31	1.11	6.99
11	43.00	-2.34	4.09	26.75	20.23	18.34
12	-2.95	18.64	9.50	2.91	10.09	7.64
13	-0.85	40.31	12.98	-1.67	40.38	18.23
14	20.34	-1.50	15.00	48.41	18.72	20.20
15	8.94	-0.50	0.12	12.32	13.24	6.82
16	6.39	-1.43	-2.29	12.73	14.87	6.05
17	40.32	5.29	36.78	13.62	49.56	29.11
18	5.69	16.58	15.22	35.17	13.35	17.20