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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, not impregnated | $1,542,572 | | $1,180,041 | $2,080,764 | $2,488,035 | $240,256 |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | | $5,334 | $264,652 | $620,142 | $474,100 | |
| Total | $1,542,572 | $5,334 | $1,444,693 | $2,700,906 | $2,962,135 | $240,256 |
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