| Company | Score | Outlook | Date |
|---|---|---|---|
| Moody’s | Ba2 | Optimistic | Jul 10 2023 |
| S&P | BBB- | Steady | Jul 21 2022 |
| Moody’s | Ba2 | Steady | Nov 19 2021 |
| S&P | BBB- | Destructive | Jul 27 2021 |
| Moody’s | Ba1 | Destructive | Could 22 2020 |
| S&P | BBB- | Steady | Mar 26 2020 |
| S&P | BBB | Steady | Jul 09 2019 |
| S&P | BBB+ | Destructive | Apr 28 2018 |
| Moody’s | Ba1 | Steady | Apr 25 2017 |
| S&P | BBB+ | Steady | Apr 21 2017 |
| S&P | A- | Destructive | Apr 22 2016 |
| Moody’s | Baa3 | Destructive | Apr 15 2016 |
| Moody’s | Baa2 | Destructive Watch | Mar 04 2016 |
| S&P | A | Destructive | Dec 24 2015 |
| S&P | A | Destructive | Dec 24 2015 |
| Moody’s | Baa2 | Destructive | Apr 30 2015 |
| S&P | A | Steady | Sep 14 2009 |
| S&P | A | Destructive Watch | Feb 03 2009 |
| S&P | A | Steady | Aug 15 2008 |
| S&P | A- | Optimistic | Sep 27 2007 |
| Moody’s | Baa1 | Steady | Jul 13 2006 |
| Moody’s | Baa2 | Steady | Aug 09 2005 |
| S&P | A- | Steady | Jul 21 2005 |
| S&P | BBB+ | Optimistic | Jun 16 2004 |
| S&P | BBB | Steady | Apr 02 2003 |
| S&P | BBB- | Optimistic | Feb 26 2002 |
| Moody’s | Baa3 | Steady | Apr 06 2000 |
| Moody’s | Ba1 | Optimistic Watch | Jan 11 2000 |
| S&P | BBB- | Steady | Sep 13 1999 |
| S&P | BB+ | Optimistic | Mar 14 1996 |
| Moody’s | Ba1 | Steady | Oct 10 1995 |
| Moody’s | Ba2 | Steady | Feb 08 1993 |
