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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,511,755,361 | 2,446,751,990 | 2,446,751,990 |
| 2006 | $2,897,035,234 | 2,419,864,254 | 2,419,864,254 |
| 2007 | $2,799,079,112 | 2,090,799,680 | 2,090,799,680 |
| 2008 | $3,510,028,615 | 2,312,881,677 | 2,312,881,677 |
| 2009 | $4,248,760,606 | 3,860,605,651 | 3,860,605,651 |
| 2010 | $4,439,950,142 | 3,494,757,584 | 3,494,757,584 |
| 2011 | $4,924,846,165 | 3,526,833,280 | 3,526,833,280 |
Note: Quantity represents Weight in kilograms
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