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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $844,995,000 | 11,435,776 | 11,435,776 |
| 2006 | $1,167,596,000 | 14,146,158 | 14,146,158 |
| 2007 | $1,660,049,000 | 20,029,781 | 20,029,781 |
| 2008 | $2,296,566,000 | 24,588,796 | 24,588,796 |
| 2009 | $2,137,951,000 | 21,190,539 | 21,190,539 |
| 2010 | $2,435,241,000 | 26,942,508 | 26,942,508 |
| 2011 | $3,152,058,000 | 29,845,502 | 29,845,502 |
Note: Quantity represents Weight in kilograms
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