| Period | Alumina Grade | Reported Alumina Production (thousands of Metric Tons) |
| First Quarter 2010 |
Chemical | 243 |
| Metallurgical | 7,134 | |
| Total | 7,377 | |
| Second Quarter 2010 |
Chemical | 270 |
| Metallurgical | 7,067 | |
| Total | 7,337 | |
| Third Quarter 2010 |
Chemical | 232 |
| Metallurgical | 6,948 | |
| Total | 7,180 | |
| Fourth Quarter 2010 |
Chemical | 139 |
| Metallurgical | 6,922 | |
| Total | 7,061 | |
Year 2010 |
Chemical | 884 |
| Metallurgical | 28,071 | |
| Total | 28,955 | |
| First Quarter 2011 |
Chemical | 219 |
| Metallurgical | 8,051 | |
| Total | 8,270 |
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