Credit rating
| 2005 | 2006 | 2007 | 2008 | 2009 | |
|---|---|---|---|---|---|
| Credit ratings | |||||
| Standard & Poor's | |||||
| Long term | A– / stable | A / stable | A+ / stable | AA– / stable | AA– / stable |
| Short term | A-2 | A-1 | A-1 | A-1+ | A-1+ |
| Moody's | |||||
| Long term | A1 / stable | A1 / stable | A1 / stable | ||
| Short term | Prime-1 | Prime-1 | Prime-1 | ||