2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000,000 $100,000,000 $150,000,000 $200,000,000 $250,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $140,344,223 | 35,919,412 | 35,919,412 |
| 2006 | $161,080,885 | 38,874,913 | 38,874,913 |
| 2007 | $194,292,896 | 44,049,495 | 44,049,495 |
| 2008 | $207,877,491 | 39,473,715 | 39,473,715 |
| 2009 | $161,551,551 | 28,369,461 | 28,369,461 |
| 2010 | $140,781,316 | 23,988,704 | 23,988,704 |
| 2011 | $167,913,463 | 24,674,907 | 24,674,907 |
Note: Quantity represents Weight in kilograms
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