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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,534,337 | 201,005 | 1,342,458 |
| 2006 | $8,269,651 | 300,351 | 876,179 |
| 2007 | $14,529,981 | 495,979 | 1,252,632 |
| 2008 | $23,807,817 | 597,779 | 1,604,640 |
| 2009 | $38,393,668 | 812,096 | 2,537,363 |
| 2010 | $28,579,535 | 614,843 | 2,297,877 |
| 2011 | $43,702,114 | 1,017,194 | 3,170,598 |
Note: Quantity represents Number of pairs
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