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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,663,431 | 1,866,315 | 2,444,149 |
| 2006 | $8,662,521 | 2,389,019 | 3,738,457 |
| 2007 | $11,552,975 | 2,773,967 | 4,928,658 |
| 2008 | $13,048,114 | 2,481,512 | 4,385,318 |
| 2009 | $7,690,238 | 1,770,222 | 2,159,413 |
| 2010 | $12,040,716 | 2,528,996 | 3,275,270 |
| 2011 | $10,295,489 | 2,140,968 | 3,416,133 |
Note: Quantity represents Number of pairs
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