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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,539,955,244 | 42,154,032 | 42,154,032 |
| 2006 | $4,685,268,286 | 45,968,994 | 45,968,994 |
| 2007 | $3,608,019,244 | 26,062,454 | 26,062,454 |
| 2008 | $2,995,885,758 | 31,565,096 | 31,565,096 |
| 2009 | $1,968,197,838 | 15,753,224 | 15,753,224 |
| 2010 | $1,276,900,949 | 7,179,320 | 7,179,320 |
| 2011 | $1,136,109,801 | 5,132,985 | 5,132,985 |
Note: Quantity represents Weight in kilograms
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