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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,005,728,000 | 4,556,890,300 | 4,556,890,300 |
| 2006 | $1,153,127,000 | 4,594,597,000 | 4,594,597,000 |
| 2007 | $1,364,955,000 | 4,395,527,981 | 4,395,527,981 |
| 2008 | $2,071,372,000 | 4,537,238,100 | 4,537,238,100 |
| 2009 | $1,029,267,000 | 4,125,097,300 | 4,125,097,300 |
| 2010 | $1,840,006,855 | 5,379,818,100 | 5,379,818,100 |
| 2011 | $2,425,833,113 | 5,654,561,074 | 5,654,561,074 |
Note: Quantity represents Weight in kilograms
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