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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, not impregnated | $15,801,920 | $12,765,965 | $10,966,105 | $15,083,001 | $12,871,888 | $6,608,890 | $75,900 |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | $15,197,283 | $15,168,463 | $15,822,030 | $28,325,257 | $13,615,962 | $14,877,345 | $13,086,845 |
| Total | $30,999,203 | $27,934,428 | $26,788,135 | $43,408,258 | $26,487,850 | $21,486,235 | $13,162,745 |
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