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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | $3,356,545 | $2,459,109 | $1,136,955 | $691,329 | $2,487,255 | $1,421,140 |
| Total | $3,356,545 | $2,459,109 | $1,136,955 | $691,329 | $2,487,255 | $1,421,140 |
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