年 |
1998 |
1999 |
2000 |
2001 |
2002 |
1月 |
6,059,533 |
6,404,470 |
6,139,305 |
5,609,446 |
6,657,016 |
2月 |
5,768,168 |
6,074,901 |
5,681,255 |
5,240,820 |
6,193,791 |
3月 |
5,524,413 |
5,788,960 |
5,516,786 |
5,041,971 |
5,872,829 |
4月 |
5,725,086 |
5,876,197 |
5,564,588 |
5,252,851 |
6,013,613 |
5月 |
6,114,204 |
6,206,150 |
5,795,357 |
5,749,464 |
6,329,453 |
6月 |
6,448,734 |
6,519,178 |
6,078,632 |
6,192,512 |
6,663,387 |
7月 |
6,806,057 |
6,749,210 |
6,364,523 |
6,576,075 |
6,896,201 |
8月 |
7,037,836 |
6,978,115 |
6,560,205 |
6,888,848 |
7,130,055 |
9月 |
7,268,592 |
7,292,291 |
6,854,681 |
7,261,934 |
7,384,108 |
10月 |
7,533,283 |
7,443,251 |
7,091,843 |
7,453,778 |
7,457,920 |
11月 |
7,498,618 |
7,444,913 |
6,803,053 |
7,554,750 |
7,272,705 |
12月 |
7,055,564 |
6,906,222 |
6,071,016 |
7,204,251 |
6,715,467 |
| 单位：百万立方英尺 |
