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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $21,327,802 | 619,272 | 1,461,810 |
| 2006 | $22,948,671 | 613,407 | 1,129,990 |
| 2007 | $25,099,492 | 702,357 | 1,154,526 |
| 2008 | $27,631,871 | 737,449 | 1,164,801 |
| 2009 | $16,467,212 | 409,375 | 485,934 |
| 2010 | $11,999,105 | 304,462 | 324,834 |
| 2011 | $8,803,923 | 208,088 | 221,558 |
Note: Quantity represents Number of pairs
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