| Issuer Rating | The rating outlook | Date of update |
|---|---|---|
| BBB – | Stable | October 5, 2018 |
| BBB – | Stable | December 05, 2016 |
| BBB – | Stable | October 30, 2015 |
| BBB – | Stable | October 31, 2014 |
| BBB – | Stable | July 19, 2012 |
| BBB – | Negative | July21, 2011 |
| BBB – | Stable | December 16, 2009 |
| BBB – | Negative | June 5, 2009 |
| Rating Watch Negative | Negative | February 19, 2009 |
| BBB – | Negative | November 10, 2008 |
| BBB – | Stable | October 20, 2008 |
| BBB – | Stable | March 17, 2008 |
| BB + | Positive | November 07, 2006 |
| Issuer Rating | The rating outlook | Date of update |
|---|---|---|
| Baa 3 | Stable | July 27, 2018 |
| Baa 3 | Stable | August 01, 2017 |
| Baa 3 | Negative | April 26, 2016 |
| Baa 3 | Stable | April 22, 2015 |
| On review for downgrade | Negative | September 03, 2014 |
| Baa 3 | Stable | October 30, 2012 |
| Baa 3 | Stable | November 08, 2011 |
| Baa 3 | Stable | December 16, 2009 |
| Baa 3 | Negative | June 5, 2009 |
| Baa 3 | Negative | February 19, 2009 |
| Baa 3 | Negative | November 10, 2008 |
| Baa 3 | Stable | October 20, 2008 |
| Baa 3 | Stable | March 17, 2008 |