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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $138,766 | $114,568 | $75,091 | $27,736 | $30,613 | $23,957 | $19,995 |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $3,164 | $2,148 | $24,614 | $59,462 | $4,512 | $12,335 | $3,413 |
| Total | $141,930 | $116,716 | $99,705 | $87,198 | $35,125 | $36,292 | $23,408 |
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