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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Railway/tramway sleepers (cross-ties) of wood, not impregnated | $3,786,323 | $6,621,759 | $8,012,802 | $12,657,280 | $3,890,443 | $5,946,088 | $4,981,304 |
| Railway/tramway sleepers (cross-ties) of wood, other than those not impregn ... | $3,006,163 | $2,597,728 | $6,663,610 | $6,583,554 | $3,081,264 | $4,055,958 | $5,532,308 |
| Total | $6,792,486 | $9,219,487 | $14,676,412 | $19,240,834 | $6,971,707 | $10,002,046 | $10,513,612 |
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