| Years | Trade Value in 1000 USD | Revenue Effect in 1000 USD |
| 2010 | 73,890 | 0.1 |
| 2009 | 30,710 | 0.00 |
| 2008 | 28,790 | 0.00 |
| 2007 | 37,860 | 0.20 |
| 2006 | 4880 | 0.00 |