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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $9,961,977 | $12,449,004 | $14,426,203 | $13,568,279 | $10,676,311 | $18,071,990 | $17,458,211 |
| Decolourising earths & fuller's earth | $796,714 | $681,762 | | | | | |
| Fire-clay | $18,755,382 | $24,923,287 | $34,265,083 | $36,580,470 | $26,409,205 | $27,421,380 | $41,426,325 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $3,671,600 | $1,521,036 | $1,291,135 | $2,136,197 | $1,150,788 | $2,169,246 | $2,605,809 |
| Andalusite, kyanite & sillimanite | $321,253 | $1,290,024 | $1,700,057 | $2,264,592 | $1,622,524 | $3,062,354 | $3,702,415 |
| Mullite | $68,912 | $138,206 | $71,267 | $141,202 | $284,072 | $400,186 | $110,160 |
| Chamotte/dinas earths | $1,459,401 | $2,515,030 | $2,753,227 | $1,400,482 | $964,570 | $1,279,220 | $1,010,176 |
| Total | $35,035,239 | $43,518,349 | $54,506,972 | $56,091,222 | $41,107,470 | $52,404,376 | $66,313,096 |
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