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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,941,341,604 | 9,343,074 | 9,343,074 |
| 2006 | $570,893,717 | 4,345,719 | 4,345,719 |
| 2007 | $380,067,616 | 3,993,599 | 3,993,599 |
| 2008 | $314,986,907 | 2,531,457 | 2,531,457 |
| 2009 | $694,778,160 | 2,947,766 | 2,947,766 |
| 2010 | $1,224,793,189 | 4,058,176 | 4,058,176 |
| 2011 | $1,493,369,018 | 3,920,628 | 3,920,628 |
Note: Quantity represents Weight in kilograms
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