Natural mpweya mtengo tchati kwa Europe 1991
Price of Gasi mu 1991
| Date | Madola Btu Miliyoni |
|---|---|
| December 1991 | 1.381000 |
| November 1991 | 2.105000 |
| October 1991 | 2.045000 |
| September 1991 | 1.922000 |
| August 1991 | 1.571000 |
| July 1991 | 1.250000 |
| June 1991 | 3.290000 |
| mulole 1991 | 1.335000 |
| April 1991 | 1.380000 |
| March 1991 | 3.330000 |
| February 1991 | 1.360000 |
| January 1991 | 1.395000 |
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| Anapeza cholakwika? malangizowo? Tiuze | |