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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,066 | 861 | 530 |
| 2006 | $9,209 | 1,699 | 1,760 |
| 2007 | $17,392 | 3,833 | 3,830 |
| 2008 | $53,273 | 4,262 | 5,532 |
| 2009 | $18,873 | 3,552 | 3,220 |
| 2010 | $217,049 | 4,831 | 20,525 |
| 2011 | $61,999 | 3,335 | 3,304 |
Note: Quantity represents Number of pairs
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