|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Slates & boards, with writing/drawing surfaces, whether or not framed | $81,658,332 | $109,318,187 | $110,636,881 | $102,967,228 | $86,466,778 | $111,815,716 | $107,698,093 |
| Total | $81,658,332 | $109,318,187 | $110,636,881 | $102,967,228 | $86,466,778 | $111,815,716 | $107,698,093 |
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