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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,332,525,734 | 435,010,394 | 435,010,394 |
| 2006 | $2,335,692,273 | 336,360,192 | 336,360,192 |
| 2007 | $2,416,347,084 | 343,762,322 | 343,762,322 |
| 2008 | $2,152,510,993 | 265,508,089 | 265,508,089 |
| 2009 | $1,576,058,966 | 163,008,743 | 163,008,743 |
| 2010 | $1,739,857,659 | 194,169,242 | 194,169,242 |
| 2011 | $1,864,843,359 | 216,281,226 | 216,281,226 |
Note: Quantity represents Weight in kilograms
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