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| Commodity | 2006 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, not impregnated | $192 | | | | |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | | $1,599 | $9,988 | $6,844 | $29,319 |
| Total | $192 | $1,599 | $9,988 | $6,844 | $29,319 |
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