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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,192,791 | 434,593 | 1,074,222 |
| 2006 | $13,622,169 | 1,059,975 | 1,017,867 |
| 2007 | $9,923,237 | 730,544 | 389,923 |
| 2008 | $2,204,556 | 166,950 | 0 |
| 2009 | $1,748,807 | 125,835 | 58,222 |
| 2010 | $1,304,064 | 86,436 | 45,297 |
| 2011 | $1,055,433 | 52,087 | 36,779 |
Note: Quantity represents Number of pairs
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