2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $500,000,000 $1,000,000,000 $1,500,000,000 $2,000,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,601,163,468 | 96,571,982 | 96,571,982 |
| 2006 | $1,677,293,665 | 0 | 0 |
| 2007 | $1,703,171,989 | 88,823,758 | 88,823,758 |
| 2008 | $1,388,953,566 | 63,088,338 | 63,088,338 |
| 2009 | $1,128,761,611 | 40,093,233 | 40,093,233 |
| 2010 | $1,494,004,787 | 57,528,798 | 57,528,798 |
| 2011 | $1,787,495,945 | 67,307,485 | 67,307,485 |
Note: Quantity represents Weight in kilograms
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