| Date Filed | Type | Description | Filer | View |
| 04/16/2013 | ARS | An annual report to security holders | |
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| 02/22/2013 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/18/2012 | ARS | An annual report to security holders | |
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| 02/23/2012 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/13/2011 | ARS | An annual report to security holders | |
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| 02/24/2011 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/12/2010 | ARS | An annual report to security holders | |
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| 02/24/2010 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/16/2009 | ARS | An annual report to security holders | |
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| 02/19/2009 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/15/2008 | ARS | An annual report to security holders | |
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| 02/20/2008 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/12/2007 | ARS | An annual report to security holders | |
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| 02/26/2007 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 04/05/2006 | ARS | An annual report to security holders | |
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