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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $39,666,610 | 1,971,501 | 3,331,442 |
| 2006 | $34,579,376 | 1,305,787 | 2,505,226 |
| 2007 | $38,513,649 | 1,319,870 | 2,373,192 |
| 2008 | $48,238,735 | 1,688,885 | 2,465,227 |
| 2009 | $55,539,143 | 1,740,381 | 2,699,222 |
| 2010 | $60,872,829 | 1,870,031 | 3,193,495 |
| 2011 | $71,006,442 | 5,327,582 | 3,087,475 |
Note: Quantity represents Number of pairs
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