年 |
1985 |
1986 |
1987 |
1988 |
1989 |
1月 |
642,000 |
414,000 |
513,000 |
578,000 |
418,000 |
2月 |
438,000 |
369,000 |
320,000 |
456,000 |
602,000 |
3月 |
217,000 |
213,000 |
210,000 |
255,000 |
362,000 |
4月 |
91,000 |
73,000 |
101,000 |
92,000 |
138,000 |
5月 |
23,000 |
42,000 |
28,000 |
46,000 |
44,000 |
6月 |
31,000 |
24,000 |
21,000 |
36,000 |
20,000 |
7月 |
45,000 |
29,000 |
27,000 |
42,000 |
29,000 |
8月 |
50,000 |
26,000 |
43,000 |
52,000 |
29,000 |
9月 |
20,000 |
25,000 |
19,000 |
46,000 |
39,000 |
10月 |
71,000 |
48,000 |
86,000 |
92,000 |
96,000 |
11月 |
202,000 |
197,000 |
153,000 |
157,000 |
223,000 |
12月 |
529,000 |
352,000 |
359,000 |
391,000 |
805,000 |
| 单位:百万立方英尺 |
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