年 |
1985 |
1986 |
1987 |
1988 |
1989 |
1月 |
32,000 |
48,000 |
38,000 |
47,000 |
53,000 |
2月 |
47,000 |
54,000 |
35,000 |
50,000 |
32,000 |
3月 |
98,000 |
109,000 |
105,000 |
99,000 |
106,000 |
4月 |
204,000 |
140,000 |
163,000 |
162,000 |
180,000 |
5月 |
294,000 |
255,000 |
293,000 |
282,000 |
321,000 |
6月 |
252,000 |
255,000 |
248,000 |
274,000 |
374,000 |
7月 |
309,000 |
274,000 |
226,000 |
294,000 |
371,000 |
8月 |
278,000 |
279,000 |
241,000 |
282,000 |
356,000 |
9月 |
272,000 |
239,000 |
227,000 |
308,000 |
320,000 |
10月 |
199,000 |
189,000 |
146,000 |
198,000 |
221,000 |
11月 |
99,000 |
74,000 |
105,000 |
117,000 |
105,000 |
12月 |
44,000 |
36,000 |
59,000 |
62,000 |
52,000 |
| 单位：百万立方英尺 |
