5/18/2011

  S&P Report May 2011

4/14/2011

  S&P Report April 2011

1/24/2011

  Moody´s Rating January 2011

10/29/2010

  S&P Report October 2010

10/20/2010

  S&P Report October 2010

8/3/2010

  Moody´s Rating August 2010

7/30/2010

  Moody´s Rating July 2010

5/11/2010

  S&P Report May 2010

4/26/2010

  Moody´s Rating April 2010

4/6/2010

  Moody´s Rating April 2010

11/18/2009

  Moody´s Rating November 2009

11/11/2009

  Moody´s Rating November 2009

10/23/2009

  S&P Report October 2009

7/2/2009

  S&P Report July 2009

5/8/2009

  S&P Report May 2009

12/18/2008

  S&P Report December 2008

12/8/2008

  Moody´s Rating December 2008

11/24/2008

  S&P Report DNovember 2008

11/7/2008

  S&P Report November 2008

10/10/2008

  Moody´s Rating October 2008

10/7/2008

  S&P Report October 2008

9/30/2008

  S&P Report September 2008

8/15/2008

  S&P Report August 2008

7/17/2008

  Moody´s Rating July 2008

5/23/2008

  Moody´s Rating May 2008

4/18/2008

  S&P Report April 2008

4/1/2008

  S&P Report April 2008

3/7/2008

  Moody´s Rating March 2008

12/4/2007

  S&P Report December 2007

11/20/2007

  S&P Report November 2007

7/10/2007

  S&P Report July2007

8/11/2006

  Moody´s Rating August 2006

6/23/2005

  Moody´s Rating June 2005