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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $76,610 | 13,937 | 12,323 |
| 2006 | $105,725 | 23,436 | 17,007 |
| 2007 | $145,785 | 23,156 | 61,023 |
| 2008 | $175,649 | 24,680 | 99,020 |
| 2009 | $132,715 | 19,618 | 79,057 |
| 2010 | $71,067 | 17,142 | 51,943 |
| 2011 | $259,874 | 40,389 | 138,629 |
Note: Quantity represents Number of pairs
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