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| TABLE 2 | ||||||||
| ESTIMATED PRODUCTION AND SHIPMENTS OF ALUMINA | ||||||||
| IN THE UNITED STATES1 | ||||||||
| (Thousand metric tons) | ||||||||
| Total | ||||||||
| Calcined� | Other | As produced | Calcined | |||||
| Year | alumina | alumina2 | or shipped3 | equivalent | ||||
| Production: | ||||||||
| 2005 | 4,750 | 708 | 5,460 | 5,220 | ||||
| 2006 | 4,610 | 618 | 5,230 | 4,700 | ||||
| Shipments: | ||||||||
| 2005 | 4,760 | 658 | 5,420 | 5,190 | ||||
| 2006 | 4,580 | 564 | 5,150 | 4,670 | ||||
| 1Data are rounded to no more than three significant digits. | ||||||||
| 2Trihydrate, activated, tabular, and other aluminas. Excludes calcium | ||||||||
| and sodium aluminates. | ||||||||
| 3Includes only the end product if one type of alumina was produced | ||||||||
| and used to make another type of alumina. | ||||||||
Source: United States Geological Survey Mineral Resources Program