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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, not impregnated | | | | $38,612 | $855,456 | $2,384,729 | $1,493,373 |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | $1,421,496 | $3,451,511 | $3,863,413 | $5,995,005 | $636,406 | | |
| Total | $1,421,496 | $3,451,511 | $3,863,413 | $6,033,617 | $1,491,862 | $2,384,729 | $1,493,373 |
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