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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,270,000 | 255,243,800 | 255,243,800 |
| 2006 | $1,629,000 | 259,478,100 | 259,478,100 |
| 2007 | $1,998,000 | 325,846,000 | 325,846,000 |
| 2008 | $1,758,000 | 275,519,900 | 275,519,900 |
| 2009 | $1,455,000 | 238,619,800 | 238,619,800 |
| 2010 | $1,045,000 | 163,251,800 | 163,251,800 |
| 2011 | $611,000 | 84,973,900 | 84,973,900 |
Note: Quantity represents Weight in kilograms
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