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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $90,778 | 7,089 | 26,662 |
| 2006 | $110,367 | 8,619 | 79,707 |
| 2007 | $43,389 | 0 | 150,582 |
| 2008 | $263,731 | 17,934 | 213,925 |
| 2009 | $172,059 | 10,684 | 42,233 |
| 2010 | $567,625 | 31,413 | 163,283 |
| 2011 | $265,473 | 14,062 | 23,579 |
Note: Quantity represents Number of pairs
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