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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,987,834,290 | 1,849,433,051 | 1,849,433,051 |
| 2006 | $3,069,208,760 | 2,700,511,343 | 2,700,511,343 |
| 2007 | $4,536,607,810 | 3,842,466,557 | 3,842,466,557 |
| 2008 | $6,747,386,091 | 4,375,313,343 | 4,375,313,343 |
| 2009 | $6,042,045,294 | 3,479,787,176 | 3,479,787,176 |
| 2010 | $6,013,990,760 | 3,830,285,585 | 3,830,285,585 |
| 2011 | $7,415,076,135 | 4,393,272,088 | 4,393,272,088 |
Note: Quantity represents Weight in kilograms
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