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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $585,100,000 | 513,227,900 | 513,227,900 |
| 2006 | $803,148,000 | 662,208,600 | 662,208,600 |
| 2007 | $643,549,000 | 458,908,126 | 458,908,126 |
| 2008 | $676,097,000 | 433,960,200 | 433,960,200 |
| 2009 | $354,858,000 | 343,208,867 | 343,208,867 |
| 2010 | $531,454,561 | 402,076,400 | 402,076,400 |
| 2011 | $605,228,084 | 381,067,040 | 381,067,040 |
Note: Quantity represents Weight in kilograms
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