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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,985,524,826 | 247,708,724 | 247,708,724 |
| 2006 | $1,771,167,787 | 223,443,018 | 223,443,018 |
| 2007 | $1,645,987,213 | 212,114,188 | 212,114,188 |
| 2008 | $1,402,029,367 | 188,308,645 | 188,308,645 |
| 2009 | $1,125,503,714 | 146,971,878 | 146,971,878 |
| 2010 | $1,817,927,276 | 210,896,143 | 210,896,143 |
| 2011 | $1,989,567,253 | 200,359,845 | 200,359,845 |
Note: Quantity represents Weight in kilograms
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