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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $409,871,020 | 350,385,290 | 350,385,290 |
| 2006 | $536,198,475 | 404,978,483 | 404,978,483 |
| 2007 | $664,145,460 | 474,228,163 | 474,228,163 |
| 2008 | $630,212,039 | 390,563,053 | 390,563,053 |
| 2009 | $1,091,291,125 | 931,396,586 | 931,396,586 |
| 2010 | $1,372,799,626 | 933,973,155 | 933,973,155 |
| 2011 | $1,745,951,406 | 1,030,336,889 | 1,030,336,889 |
Note: Quantity represents Weight in kilograms
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