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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $48,636,143 | 378,994,901 | 378,994,901 |
| 2006 | $44,298,969 | 346,405,209 | 346,405,209 |
| 2007 | $60,869,213 | 418,588,032 | 418,588,032 |
| 2008 | $145,566,518 | 728,860,033 | 728,860,033 |
| 2009 | $82,468,279 | 354,377,744 | 354,377,744 |
| 2010 | $106,129,776 | 547,041,312 | 547,041,312 |
| 2011 | $90,071,508 | 433,536,032 | 433,536,032 |
Note: Quantity represents Weight in kilograms
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