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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $331,607,565 | 1,345,343,859 | 1,345,343,859 |
| 2006 | $303,904,415 | 1,127,273,469 | 1,127,273,469 |
| 2007 | $259,651,242 | 842,388,626 | 842,388,626 |
| 2008 | $520,034,325 | 1,433,738,874 | 1,433,738,874 |
| 2009 | $1,140,298,091 | 5,287,922,728 | 5,287,922,728 |
| 2010 | $1,535,556,109 | 5,184,146,184 | 5,184,146,184 |
| 2011 | $2,112,156,740 | 5,731,830,732 | 5,731,830,732 |
Note: Quantity represents Weight in kilograms
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