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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,519,483,932 | 1,017,188,656 | 1,017,188,656 |
| 2006 | $7,246,003,157 | 1,096,303,310 | 1,096,303,310 |
| 2007 | $8,171,296,527 | 1,085,540,062 | 1,085,540,062 |
| 2008 | $9,059,783,508 | 1,067,404,087 | 1,067,404,087 |
| 2009 | $5,613,986,063 | 583,752,022 | 583,752,022 |
| 2010 | $7,155,211,637 | 846,240,024 | 846,240,024 |
| 2011 | $7,713,661,858 | 921,068,101 | 921,068,101 |
Note: Quantity represents Weight in kilograms
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