| Period | Alumina Grade | Reported Alumina Production (thousands of Metric Tons) |
| First Quarter 2007 |
Chemical | 179 |
| Metallurgical | 4,199 | |
| Total | 4,378 | |
| Second Quarter 2007 |
Chemical | 247 |
| Metallurgical | 4,789 | |
| Total | 5,045 | |
| Third Quarter 2007 |
Chemical | 231 |
| Metallurgical | 4,817 | |
| Total | 5,048 | |
| Fourth Quarter 2007 |
Chemical | 252 |
| Metallurgical | 4,733 | |
| Total | 4,985 | |
| Year 2007 |
Chemical | 909 |
| Metallurgical | 18,547 | |
| Total | 19,456 | |
| First Quarter 2008 |
Chemical | 218 |
| Metallurgical | 5,044 | |
| Total | 5,262 |
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