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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $37,676,244 | 2,866,143 | 1,748,318 |
| 2006 | $44,967,399 | 1,246,373 | 1,171,437 |
| 2007 | $57,324,959 | 2,528,651 | 1,805,575 |
| 2008 | $55,522,924 | 1,565,268 | 1,403,876 |
| 2009 | $37,898,886 | 2,583,249 | 870,595 |
| 2010 | $34,882,747 | 1,475,110 | 1,071,833 |
| 2011 | $39,708,906 | 1,220,129 | 1,221,917 |
Note: Quantity represents Number of pairs
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