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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,684,654,904 | 40,461,639 | 40,461,639 |
| 2006 | $1,351,828,852 | 41,373,184 | 41,373,184 |
| 2007 | $1,728,684,163 | 43,620,614 | 43,620,614 |
| 2008 | $1,860,056,955 | 47,385,059 | 47,385,059 |
| 2009 | $1,003,332,065 | 58,975,881 | 58,975,881 |
| 2010 | $1,001,475,873 | 50,028,930 | 50,028,930 |
| 2011 | $1,243,497,060 | 60,187,295 | 60,187,295 |
Note: Quantity represents Weight in kilograms
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