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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $34,000 | 128 | 357 |
| 2006 | $55,900 | 843 | 2,656 |
| 2007 | $61,600 | 906 | 2,941 |
| 2008 | $78,600 | 1,611 | 6,498 |
| 2009 | $50,200 | 1,714 | 7,995 |
| 2010 | $98,200 | 5,809 | 21,635 |
| 2011 | $413,200 | 53,303 | 216,068 |
Note: Quantity represents Area in square metres
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