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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $19,576,908 | 766,650 | 1,080,745 |
| 2006 | $18,432,165 | 948,125 | 1,276,911 |
| 2007 | $22,132,198 | 0 | 1,003,716 |
| 2008 | $29,626,235 | 1,471,270 | 1,322,047 |
| 2009 | $35,823,746 | 1,196,902 | 1,596,134 |
| 2010 | $53,479,748 | 2,079,823 | 3,130,582 |
| 2011 | $59,202,810 | 2,500,114 | 3,419,721 |
Note: Quantity represents Number of pairs
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