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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $110,026,042 | 434,800,925 | 434,800,925 |
| 2006 | $225,339,525 | 663,690,749 | 663,690,749 |
| 2007 | $321,736,898 | 814,257,638 | 814,257,638 |
| 2008 | $699,226,115 | 1,620,530,784 | 1,620,530,784 |
| 2009 | $425,095,576 | 1,557,308,862 | 1,557,308,862 |
| 2010 | $515,536,252 | 1,612,187,653 | 1,612,187,653 |
| 2011 | $575,984,067 | 1,539,080,084 | 1,539,080,084 |
Note: Quantity represents Weight in kilograms
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