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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $12,725,200 | $13,778,242 | $16,987,124 | $17,458,372 | $12,185,115 | $13,840,982 |
| Decolourising earths & fuller's earth | $109,565 | $109,510 | | | | |
| Fire-clay | $8,171,175 | $12,697,423 | $18,223,314 | $13,883,544 | $2,656,878 | $2,665,952 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $4,461,083 | $5,337,243 | $6,802,723 | $4,093,006 | $2,556,832 | $3,824,883 |
| Andalusite, kyanite & sillimanite | $8,173,542 | $6,722,429 | $9,373,728 | $11,404,089 | $8,656,827 | $12,288,861 |
| Mullite | $813,535 | $1,086,546 | $1,733,001 | $4,788,705 | $1,950,823 | $2,434,522 |
| Chamotte/dinas earths | $7,792,948 | $6,981,659 | $9,110,482 | $8,042,433 | $4,630,710 | $5,765,297 |
| Total | $42,247,048 | $46,713,052 | $62,230,372 | $59,670,149 | $32,637,185 | $40,820,497 |
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