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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $648,240,579 | 50,176,500 | 50,176,500 |
| 2006 | $992,850,682 | 81,251,413 | 81,251,413 |
| 2007 | $1,191,803,303 | 86,093,965 | 86,093,965 |
| 2008 | $1,291,172,833 | 77,816,508 | 77,816,508 |
| 2009 | $1,290,908,517 | 70,599,307 | 70,599,307 |
| 2010 | $962,706,703 | 48,566,984 | 48,566,984 |
| 2011 | $968,410,144 | 53,957,107 | 53,957,107 |
Note: Quantity represents Weight in kilograms
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