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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Slates & boards, with writing/drawing surfaces, whether or not framed | $386,765 | $410,925 | $524,638 | $799,806 | $569,465 | $692,536 | $2,294,076 |
| Total | $386,765 | $410,925 | $524,638 | $799,806 | $569,465 | $692,536 | $2,294,076 |
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