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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,055,218,475 | 1,136,470,899 | 1,136,470,899 |
| 2006 | $1,999,758,880 | 838,285,704 | 838,285,704 |
| 2007 | $441,120,492 | 160,793,068 | 160,793,068 |
| 2008 | $273,843,854 | 110,127,274 | 110,127,274 |
| 2009 | $90,962,317 | 45,904,021 | 45,904,021 |
| 2010 | $418,817,737 | 193,542,442 | 193,542,442 |
| 2011 | $193,209,687 | 81,871,489 | 81,871,489 |
Note: Quantity represents Weight in kilograms
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