年 |
1990 |
1991 |
1992 |
1993 |
1994 |
1月 |
93,000 |
114,877 |
67,560 |
36,692 |
34,566 |
2月 |
70,000 |
112,436 |
52,259 |
22,020 |
49,734 |
3月 |
125,000 |
128,809 |
80,919 |
79,017 |
105,507 |
4月 |
188,000 |
228,477 |
167,382 |
212,059 |
285,753 |
5月 |
293,000 |
319,065 |
329,676 |
456,000 |
427,442 |
6月 |
324,000 |
313,742 |
366,293 |
410,193 |
381,023 |
7月 |
326,000 |
289,514 |
356,854 |
385,078 |
410,433 |
8月 |
318,000 |
281,624 |
363,813 |
363,861 |
372,511 |
9月 |
284,000 |
293,988 |
346,102 |
378,308 |
345,487 |
10月 |
209,000 |
251,020 |
264,171 |
256,493 |
224,188 |
11月 |
134,000 |
150,251 |
94,981 |
106,322 |
105,304 |
12月 |
69,000 |
124,570 |
65,382 |
53,696 |
54,331 |
| 单位：百万立方英尺 |
