Table 1: The monthly production data of B52.

Time	Production	Time	Production	Time	Production	Time	Production
1	38.91	19	20.19	37	2.96	55	2.24
2	21.3	20	14.27	38	10.64	56	1.56
3	19.75	21	17.31	39	17.3	57	2.79
4	27.82	22	19.05	40	13.12	58	1.33
5	9.25	23	25.87	41	14.67	59	0.52
6	14.29	24	7.01	42	7.84	60	4.22
7	19.83	25	9.37	43	4.715	61	3.73
8	25.97	26	12.57	44	1.59	62	3.73
9	22.35	27	12.2	45	3.48	63	2.59
10	25.67	28	12.225	46	2.15	64	1.85
11	15.54	29	12.25	47	1.48	65	1.85
12	22.49	30	8.19	48	3.34	66	2.07
13	21.31	31	3.69	49	4.57	67	2.04
14	19.38	32	7.77	50	4.45	68	5.05
15	25.98	33	1.03	51	4.35	69	3.89
16	18.35	34	6.67	52	4.22	70	6.08
17	26.11	35	1.48	53	2.95	71	9.18
18	13.76	36	1.48	54	1.85