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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,368,000 | 92,741 | 72,546 |
| 2006 | $1,452,000 | 98,436 | 77,001 |
| 2007 | $1,987,000 | 150,072 | 67,695 |
| 2008 | $2,346,000 | 173,710 | 155,489 |
| 2009 | $1,395,000 | 86,522 | 96,855 |
| 2010 | $952,000 | 66,029 | 56,420 |
| 2011 | $856,000 | 63,066 | 50,131 |
Note: Quantity represents Number of pairs
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