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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,191,112,920 | 2,567,723,732 | 2,567,723,732 |
| 2006 | $4,866,554,119 | 3,641,417,406 | 3,641,417,406 |
| 2007 | $3,476,986,278 | 2,458,395,650 | 2,458,395,650 |
| 2008 | $3,490,828,120 | 2,110,392,205 | 2,110,392,205 |
| 2009 | $2,113,791,916 | 1,526,042,227 | 1,526,042,227 |
| 2010 | $5,654,557,285 | 2,836,073,302 | 2,836,073,302 |
| 2011 | $9,466,066,271 | 3,362,634,923 | 3,362,634,923 |
Note: Quantity represents Weight in kilograms
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