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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $212,550,415 | 3,810,498 | 9,690,887 |
| 2006 | $223,304,865 | 8,450,075 | 10,474,378 |
| 2007 | $364,468,823 | 9,988,893 | 13,016,093 |
| 2008 | $495,334,847 | 11,375,941 | 16,634,527 |
| 2009 | $347,817,067 | 8,651,425 | 11,917,038 |
| 2010 | $338,818,443 | 9,409,415 | 10,563,237 |
| 2011 | $418,614,733 | 11,214,205 | 15,370,629 |
Note: Quantity represents Number of pairs
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