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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $341,659,938 | 38,290,111 | 92,630,783 |
| 2006 | $397,346,973 | 31,282,444 | 99,313,698 |
| 2007 | $470,928,497 | 38,616,137 | 108,771,948 |
| 2008 | $493,082,833 | 32,720,800 | 99,251,639 |
| 2009 | $490,830,103 | 28,032,712 | 96,808,471 |
| 2010 | $585,036,162 | 32,634,069 | 112,286,670 |
| 2011 | $705,067,349 | 39,096,488 | 118,555,889 |
Note: Quantity represents Number of pairs
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