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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,162,884 | 914,027 | 1,205,480 |
| 2006 | $3,926,098 | 686,484 | 785,696 |
| 2007 | $6,196,951 | 941,772 | 753,387 |
| 2008 | $8,002,525 | 1,384,961 | 1,127,568 |
| 2009 | $7,468,596 | 1,035,217 | 1,050,262 |
| 2010 | $9,516,921 | 1,142,748 | 2,071,843 |
| 2011 | $15,695,281 | 2,500,341 | 2,222,667 |
Note: Quantity represents Number of pairs
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