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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,361,831 | 1,213,096,874 | 1,213,096,874 |
| 2006 | $16,381,752 | 1,248,676,322 | 1,248,676,322 |
| 2007 | $17,340,845 | 1,159,199,464 | 1,159,199,464 |
| 2008 | $17,263,032 | 961,316,084 | 961,316,084 |
| 2009 | $11,912,875 | 699,764,076 | 699,764,076 |
| 2010 | $11,213,887 | 641,343,054 | 641,343,054 |
| 2011 | $4,733,421 | 210,229,304 | 210,229,304 |
Note: Quantity represents Weight in kilograms
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