| Period | Alumina Grade | Reported Alumina Production (Thousands of Metric Tons) |
| First Quarter 2006 | Chemical | 178 |
| Metallurgical | 2,590 | |
| Total | 2,768 | |
| Second Quarter 2006 | Chemical | 199 |
| Metallurgical | 2,960 | |
| Total | 3,159 | |
| Third Quarter 2006 | Chemical | 201 |
| Metallurgical | 3,308 | |
| Total | 3,509 | |
| Fourth Quarter 2006 | Chemical | 200 |
| Metallurgical | 4,060 | |
| Total | 4,260 | |
| Year 2006 | Chemical | 778 |
| Metallurgical | 12,918 | |
| Total | 13,696 | |
| First Quarter 2007 | Chemical | 179 |
| Metallurgical | 4,199 | |
| Total | 4,378 | |
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