| Date | $/Ton |
| 01/05/07 | $232.40 |
| 01/12/07 | $247.80 |
| 01/19/07 | $253.20 |
| 01/26/07 | $253.20 |
| 02/02/07 | $253.80 |
| 02/09/07 | $282.60 |
| 02/16/07 | $288.00 |
| 02/23/07 | $288.00 |
| 03/02/07 | $290.80 |
| 03/09/07 | $340.00 |
| 03/16/07 | $354.00 |
| 03/23/07 | $354.00 |
| 03/30/07 | $354.00 |
| 04/06/07 | $342.92 |
| 04/13/07 | $322.00 |
| 04/20/07 | $320.40 |
| 04/27/07 | $318.52 |
| 05/04/07 | $304.80 |
| 05/11/07 | $263.40 |
| 05/18/07 | $261.40 |
| 05/25/07 | $261.40 |
| 06/01/07 | $261.40 |
| 06/08/07 | $263.48 |
| 06/15/07 | $265.00 |
| 06/22/07 | $265.00 |
| 06/29/07 | $265.00 |
| 07/06/07 | $265.85 |
| 07/13/07 | $264.40 |
| 07/20/07 | $264.40 |
| 07/27/07 | $264.40 |
| 08/03/07 | $264.40 |
| 08/10/07 | $275.44 |
| 08/17/07 | $276.60 |
| 08/24/07 | $276.60 |
| 08/31/07 | $276.60 |
| 09/07/07 | $280.55 |
| 09/14/07 | $294.36 |
| 09/21/07 | $294.60 |
| 09/28/07 | $294.60 |
| 10/05/07 | $294.12 |
| 10/12/07 | $293.40 |
| 10/19/07 | $293.40 |
| 10/26/07 | $292.60 |
| 11/02/07 | $291.20 |
| 11/09/07 | $282.16 |
| 11/16/07 | |
| 11/23/07 | |
| 11/30/07 | |
| 12/07/07 | |
| 12/14/07 | |
| 12/21/07 | |
| 12/28/07 | |
| 01/04/08 | |
| 01/11/08 | |
| 01/18/08 | |
| 01/25/08 | |
| 02/01/08 | |
| 02/08/08 | |
| 02/15/08 | |
| 02/22/08 | |
| 02/29/08 | |
| 03/07/08 | |
| 03/14/08 | |
| 03/21/08 | |
| 03/28/08 | |
| 04/04/08 | |
| 04/11/08 | |
| 04/18/08 | |
| 04/25/08 | |
| 05/02/08 | |
| 05/09/08 | |
| 05/16/08 | |
| 05/23/08 | |
| 05/30/08 | |
| 06/06/08 | |
| 06/13/08 | |
| 06/20/08 | |
| 06/27/08 | |
| 07/04/08 | |
| 07/11/08 | |
| 07/18/08 | |
| 07/25/08 | |
| 08/01/08 | |
| 08/08/08 | |
| 08/15/08 | |
| 08/22/08 | |
| 08/29/08 | |
| 09/05/08 | |
| 09/12/08 | |
| 09/19/08 | |
| 09/26/08 | |
| 10/03/08 | |
| 10/10/08 | |
| 10/17/08 | |
| 10/24/08 | |
| 10/31/08 | |
| 11/07/08 | |
| 11/14/08 | |
| 11/21/08 | |
| 11/28/08 | |
| 12/05/08 | |
| 12/12/08 | |
| 12/19/08 | |
| 12/26/08 | |
| 01/02/09 | |
| 01/09/09 | |
| 01/16/09 | |
| 01/23/09 | |
| 01/30/09 | |
| 02/06/09 | |
| 02/13/09 | |
| 02/20/09 | |
| 02/27/09 | |
| 03/06/09 | |
| 03/13/09 | |
| 03/20/09 | |
| 03/27/09 | |
| 04/03/09 | |
| 04/10/09 | |
| 04/17/09 | |
| 04/24/09 | |
| 05/01/09 | |
| 05/08/09 | |
| 05/15/09 | |
| 05/22/09 | |
| 05/29/09 | |
| 06/05/09 | |
| 06/12/09 | |
| 06/19/09 | |
| 06/26/09 | |
| 07/03/09 | |
| 07/10/09 | |
| 07/17/09 | |
| 07/24/09 | |
| 07/31/09 | |
| 08/07/09 | |
| 08/14/09 | |
| 08/21/09 | |
| 08/28/09 | |
| 09/04/09 | |
| 09/11/09 | |
| 09/18/09 | |
| 09/25/09 | |
| 10/02/09 | |
| 10/09/09 | |
| 10/16/09 | |
| 10/23/09 | |
| 10/30/09 | |
| 11/06/09 | |
| 11/13/09 | |
| 11/20/09 | |
| 11/27/09 | |
| 12/04/09 | |
| 12/11/09 | |
| 12/18/09 | |
| 12/25/09 | |
| 01/01/10 | |
| 01/08/10 | |
| 01/15/10 | |
| 01/22/10 | |
| 01/29/10 | |
| 02/05/10 | |
| 02/12/10 | |
| 02/19/10 | |
| 02/26/10 | |
| 03/05/10 | |
| 03/12/10 | |
| 03/19/10 | |
| 03/26/10 | |
| 04/02/10 | |
| 04/09/10 | |
| 04/16/10 | |
| 04/23/10 | |
| 04/30/10 | |
| 05/07/10 | |
| 05/14/10 | |
| 05/21/10 | |
| 05/28/10 | |
| 06/04/10 | |
| 06/11/10 | |
| 06/18/10 | |
| 06/25/10 | |
| 07/02/10 | |
| 07/09/10 | |
| 07/16/10 | |
| 07/23/10 | |
| 07/30/10 | |
| 08/06/10 | |
| 08/13/10 | |
| 08/20/10 | |
| 08/27/10 | |
| 09/03/10 | |
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| 09/17/10 | |
| 09/24/10 | |
| 10/01/10 | |
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| 10/29/10 | |
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| 11/26/10 | |
| 12/03/10 | |
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| 12/17/10 | |
| 12/24/10 | |
| 12/31/10 | |
| 01/07/11 | |
| 01/14/11 | |
| 01/21/11 | |
| 01/28/11 | |
| 02/04/11 | |
| 02/11/11 | |
| 02/18/11 | |
| 02/25/11 | |
| 03/04/11 | |
| 03/11/11 | |
| 03/18/11 | |
| 03/25/11 | |
| 04/01/11 | |
| 04/08/11 | |
| 04/15/11 | |
| 04/22/11 | |
| 04/29/11 | |
| 05/06/11 | |
| 05/13/11 | |
| 05/20/11 | |
| 05/27/11 | |
| 06/03/11 | |
| 06/10/11 | |
| 06/17/11 | |
| 06/24/11 | |
| 07/01/11 | |
| 07/08/11 | |
| 07/15/11 | |
| 07/22/11 | |
| 07/29/11 | |
| 08/05/11 | |
| 08/12/11 | |
| 08/19/11 | |
| 08/26/11 | |
| 09/02/11 | |
| 09/09/11 | |
| 09/16/11 | |
| 09/23/11 | |
| 09/30/11 | |
| 10/07/11 | |
| 10/14/11 | |
| 10/21/11 | |
| 10/28/11 | |
| 11/04/11 | |
| 11/11/11 | |
| 11/18/11 | |
| 11/25/11 | |
| 12/02/11 | |
| 12/09/11 | |
| 12/16/11 | |
| 12/23/11 | |
| 12/30/11 | |
| 01/06/12 | |
| 01/13/12 | |
| 01/20/12 | |
| 01/27/12 | |
| 02/03/12 | |
| 02/10/12 | |
| 02/17/12 | |
| 02/24/12 | |
| 03/02/12 | |
| 03/09/12 | |
| 03/16/12 | |
| 03/23/12 | |
| 03/30/12 | |
| 04/06/12 | |
| 04/13/12 | |
| 04/20/12 | |
| 04/27/12 | |
| 05/04/12 | |
| 05/11/12 | |
| 05/18/12 | |
| 05/25/12 | |
| 06/01/12 | |
| 06/08/12 | |
| 06/15/12 | |
| 06/22/12 | |
| 06/29/12 | |
| 07/06/12 | |
| 07/13/12 | |
| 07/20/12 | |
| 07/27/12 | |
| 08/03/12 | |
| 08/10/12 | |
| 08/17/12 | |
| 08/24/12 | |
| 08/31/12 | |
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| 09/14/12 | |
| 09/21/12 | |
| 09/28/12 | |
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| 11/16/12 | |
| 11/23/12 | |
| 11/30/12 | |
| 12/07/12 | |
| 12/14/12 | |
| 12/21/12 | |
| 12/28/12 | |
| 01/04/13 | |
| 01/11/13 | |
| 01/18/13 | |
| 01/25/13 | |
| 02/01/13 | |
| 02/08/13 | |
| 02/15/13 | |
| 02/22/13 | |
| 03/01/13 | |
| 03/08/13 | |
| 03/15/13 | |
| 03/22/13 | |
| 03/29/13 | |
| 04/05/13 | |
| 04/12/13 | |
| 04/19/13 | |
| 04/26/13 | |
| 05/03/13 |