General Note: Those Bonds in the "Aa", "A", and "Baa" groups which Moody's believes possess the strongest investment attributes are designated by the symbols "Aa1", "A1" and "Baa1". Under the expanded rating scale adopted by Moody's January 7, 1997 the numerical rating modifiers 2 and 3 have been added for long-term debt. The numerical modifier 2 indicates that the security is in the mid-range of its category, while the modifier 3 indicates that the issues is in the lower end of its generic category. A triple-A (Aaa) rating will have no numerical modifier; it remains Moody's highest bond rating. Also, generic rating Caa, CA, and C do not have numerical modifiers. Moody's ratings for short-term debt issues and commercial paper issuers have not changed.