年 |
1973 |
1974 |
1975 |
1976 |
1977 |
1月 |
NA |
NA |
NA |
1,648,000 |
1,287,000 |
2月 |
NA |
NA |
NA |
1,444,000 |
1,163,000 |
3月 |
NA |
NA |
NA |
1,326,000 |
1,215,000 |
4月 |
NA |
NA |
NA |
1,423,000 |
1,427,000 |
5月 |
NA |
NA |
NA |
1,637,000 |
1,731,000 |
6月 |
NA |
NA |
NA |
1,908,000 |
2,030,000 |
7月 |
NA |
NA |
NA |
2,192,000 |
2,348,000 |
8月 |
NA |
NA |
NA |
2,447,000 |
2,599,000 |
9月 |
NA |
NA |
2,468,000 |
2,650,000 |
2,824,000 |
10月 |
NA |
2,403,000 |
2,599,000 |
2,664,000 |
2,929,000 |
11月 |
NA |
NA |
2,541,000 |
2,408,000 |
2,821,000 |
12月 |
2,034,000 |
2,050,000 |
2,212,000 |
1,926,000 |
2,475,000 |
| 单位：百万立方英尺 |
