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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,968,585,492 | 415,050,705 | 415,050,705 |
| 2006 | $2,057,306,404 | 350,192,722 | 350,192,722 |
| 2007 | $2,072,912,970 | 253,818,708 | 253,818,708 |
| 2008 | $1,718,244,265 | 0 | 0 |
| 2009 | $1,312,786,075 | 164,338,920 | 164,338,920 |
| 2010 | $1,830,901,787 | 257,373,213 | 257,373,213 |
| 2011 | $1,918,858,592 | 270,153,433 | 270,153,433 |
Note: Quantity represents Weight in kilograms
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