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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $8,369,595 | $10,899,751 | $15,504,959 | $18,997,072 | $12,552,138 | $15,208,125 | $19,455,528 |
| Decolourising earths & fuller's earth | $1,009,515 | $850,764 | | | | | |
| Fire-clay | $12,150,502 | $12,663,619 | $15,354,664 | $23,136,504 | $13,872,838 | $18,930,777 | $27,663,513 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $7,585,886 | $7,074,312 | $6,642,709 | $8,427,127 | $6,099,039 | $5,867,307 | $9,756,405 |
| Andalusite, kyanite & sillimanite | $3,338,125 | $6,130,660 | $8,397,309 | $6,985,085 | $3,498,746 | $7,902,925 | $6,565,138 |
| Mullite | $873,810 | $1,159,196 | $2,138,668 | $3,341,786 | $715,765 | $1,681,293 | $26,186,560 |
| Chamotte/dinas earths | $1,163,494 | $1,308,831 | $1,396,480 | $2,576,504 | $1,537,345 | $2,312,342 | $1,969,780 |
| Total | $34,490,927 | $40,087,133 | $49,434,789 | $63,464,078 | $38,275,871 | $51,902,769 | $91,596,924 |
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