年 |
1975 |
1976 |
1977 |
1978 |
1979 |
1月 |
NA |
15,000 |
17,000 |
21,000 |
20,000 |
2月 |
NA |
59,000 |
97,000 |
21,000 |
22,000 |
3月 |
NA |
71,000 |
181,000 |
90,000 |
90,000 |
4月 |
NA |
166,000 |
247,000 |
175,000 |
175,000 |
5月 |
NA |
220,000 |
318,000 |
285,000 |
297,000 |
6月 |
NA |
273,000 |
306,000 |
357,000 |
337,000 |
7月 |
NA |
271,000 |
336,000 |
341,000 |
348,000 |
8月 |
NA |
268,000 |
280,000 |
351,000 |
348,000 |
9月 |
220,000 |
233,000 |
253,000 |
322,000 |
314,000 |
10月 |
190,000 |
121,000 |
152,000 |
204,000 |
189,000 |
11月 |
98,000 |
36,000 |
81,000 |
80,000 |
104,000 |
12月 |
38,000 |
21,000 |
40,000 |
32,000 |
51,000 |
| 单位：百万立方英尺 |
