Historical Ratings
| S&P | Outlook | Fitch | Outlook | Moody's | Outlook | |||||
| 07-12-1992 | BBB | 10-11-1994 | BBB+ | 25-05-1999 | Baa1 | |||||
| 20-12-1993 | BBB+ | 30-08-1995 | A− | 21-03-2006 | Baa1 | |||||
| 11-07-1995 | A- | 28-03-2005 | A | 07-07-2006 | A2 | |||||
| 14-01-2004 | A | 01-02-2011 | A+ | 20-11-2008 | A2 | |||||
| 18-12-2007 | A+ | 11-08-2017 | A | 23-03-2009 | A1 | |||||
| 26-12-2012 | AA- | 12-03-2020 | A | Negative | 16-06-2010 | Aa3 | ||||
| 13-07-2017 | A+ | 15-10-2020 | A− | Stable | 26-07-2018 | A1 | ||||
| 27-04-2020 | A+ | Negative | ----- | ----- | 25-08-2020 | A1 | Negative | |||
| 24-03-2021 | A | Stable | ----- | ----- | 15-09-2022 | A2 | Stable | |||
| 19-10-2023 | A | Negative | ----- | ----- | ----- | ----- | ||||
Ministry of Finance 
