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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $219,636,192 | 23,955,789 | 55,827,886 |
| 2006 | $275,554,598 | 26,668,128 | 59,065,930 |
| 2007 | $341,917,856 | 48,435,921 | 68,381,414 |
| 2008 | $380,657,974 | 29,562,674 | 58,526,824 |
| 2009 | $365,808,882 | 29,450,680 | 54,671,002 |
| 2010 | $470,510,125 | 36,941,749 | 63,997,194 |
| 2011 | $577,441,467 | 40,510,979 | 68,261,515 |
Note: Quantity represents Number of pairs
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