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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $20,722,000 | 1,644,800 | 2,081,065 |
| 2006 | $2,791,000 | 699,863 | 280,294 |
| 2007 | $2,924,000 | 1,008,736 | 255,840 |
| 2008 | $2,943,000 | 941,519 | 154,089 |
| 2009 | $1,197,000 | 202,600 | 45,405 |
| 2010 | $641,000 | 81,591 | 23,782 |
| 2011 | $563,000 | 252,087 | 20,547 |
Note: Quantity represents Number of pairs
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