| 19/05/2025 | | | Fitch Ratings, Inc | BBB+(uy) | CCC+ |
| 28/04/2025 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 25/11/2024 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 18/04/2024 | | | Fitch Ratings, Inc | BBB(uy) | CCC- |
| 27/04/2023 | | | Fitch Ratings, Inc | BBB(uy) | CCC- |
| 02/11/2022 | | | Fitch Ratings, Inc | BBB(uy) | CCC− |
| 28/04/2022 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 28/04/2022 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 29/04/2021 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 16/09/2020 | | | Fitch Ratings, Inc | BBB(uy) | CCC |
| 27/05/2020 | | | Fitch Ratings, Inc | BBB(uy) | CC |
| 10/09/2019 | | | Fitch Ratings, Inc | BBB (uy) | CC |
| 22/08/2019 | | | Fitch Ratings, Inc | BBB (uy) | CCC |
| 24/04/2019 | | | Fitch Ratings, Inc | BBB (uy) | B |
| 12/11/2018 | | | Fitch Ratings, Inc | BBB (uy) | B |
| 27/04/2018 | | | Fitch Ratings, Inc | BBB (uy) | B |
| 01/02/2018 | | | Fitch Ratings, Inc | BBB - (uy) | B |
| 18/04/2017 | | | Fitch Ratings, Inc | BBB- (uy) | B |
| 29/04/2016 | | | Fitch Ratings, Inc | BBB - (uy) | B |
| 30/06/2012 | | | Standard & Poors International, LLC | raBBB | |
| 30/06/2011 | | | Standard & Poors International, LLC | Ver | |
| 31/03/2011 | | | Standard & Poors International, LLC | Ver | |
| 31/12/2010 | | | Standard & Poors International, LLC | Ver | |
| 30/06/2010 | | | Standard & Poors International, LLC | Ver | |
