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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,092,132 | 2,809,465 | 971,343 |
| 2006 | $27,789,159 | 3,611,417 | 1,772,034 |
| 2007 | $46,696,300 | 9,079,398 | 3,055,740 |
| 2008 | $26,338,088 | 4,478,290 | 1,725,545 |
| 2009 | $18,826,364 | 2,370,972 | 1,172,659 |
| 2010 | $18,490,546 | 2,166,917 | 1,409,993 |
| 2011 | $16,628,441 | 2,151,175 | 1,214,795 |
Note: Quantity represents Number of pairs
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