AgencyRatingOutlookDate
Moody'sAaa Stable Feb 28 2014
Moody'sAaa Negative Jul 23 2012
S&PAAA Stable Jan 13 2012
S&PAAA Negative Watch Dec 05 2011
DBRSAAA Stable Jun 16 2011
S&PAAA Stable Jun 26 1989
Moody'sAaa Stable Feb 09 1986
S&PAAA N/A Aug 17 1983