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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $335,907,168 | 1,067,249,400 | 1,067,249,400 |
| 2006 | $460,872,163 | 864,510,608 | 864,510,608 |
| 2007 | $278,396,394 | 780,218,200 | 780,218,200 |
| 2008 | $386,132,155 | 1,004,175,543 | 1,004,175,543 |
| 2009 | $176,428,683 | 673,585,489 | 673,585,489 |
| 2010 | $1,342,209,476 | 0 | 0 |
| 2011 | $303,506,343 | 733,827,368 | 733,827,368 |
Note: Quantity represents Weight in kilograms
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