Moody's| Date | Long term | Short term | Outlook |
|---|
| 12/11/2019 | Baa1 | (P)P-2 | Stable |
| 23/03/2018 | Baa2 | (P)P-3 | Stable |
| 05/09/2016 | Baa3 | (P)P-3 | Stable |
| 01/07/2015 | Ba1 | (P)NP | Stable |
| 26/07/2013 | Ba2 | (P)NP | Stable |
S&P Global Ratings| DATE | LONG TERM | SHORT TERM | OUTLOOK |
|---|
| 03/06/2021 | BBB+ | A-2 | Positive |
| 21/03/2019 | BBB | A-2 | Positive |
| 19/01/2016 | BBB- | A-3 | Stable |
| 23/07/2015 | BB+ | B | Stable |
| 28/02/2012 | BB | B | Stable |
| 18/05/2011 | BB | B-1 | Negative |
| 20/10/2010 | BB+ | B-1 | Negative |
| 30/06/2009 | BB | B-1 | Stable |
| 24/11/2008 | BBB- | A-3 | Negative |
| 07/10/2008 | BBB | A-3 | Negative |
| 30/09/2008 | A- | A-2 | Negative |
| 18/04/2008 | A | A-1 | Negative |
| 22/12/2006 | A+ | A-1 | Negative |
| 10/02/2005 | AA- | A-1+ | Stable |
| 08/10/1997 | A+ | A-1+ | Stable |