|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Slates & boards, with writing/drawing surfaces, whether or not framed | $9,828,225 | $11,092,667 | $13,165,052 | $14,084,868 | $14,047,088 | $19,462,534 | $19,095,324 |
| Total | $9,828,225 | $11,092,667 | $13,165,052 | $14,084,868 | $14,047,088 | $19,462,534 | $19,095,324 |
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