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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $15,465,186 | 734,777 | 1,406,191 |
| 2006 | $25,955,495 | 1,824,878 | 2,359,379 |
| 2007 | $22,529,880 | 1,467,322 | 2,091,578 |
| 2008 | $23,431,269 | 1,342,212 | 2,149,438 |
| 2009 | $39,543,294 | 2,618,500 | 4,283,961 |
| 2010 | $73,036,522 | 4,165,143 | 5,682,867 |
| 2011 | $98,218,830 | 4,149,566 | 9,371,885 |
Note: Quantity represents Number of pairs
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