| Date of Evaluation | Evaluating Company | Credit Rating |
|---|---|---|
| Jun 2023 | Korea Ratings | A+ Stable |
| NICE Credit Rating | ||
| Jun 2022 | Korea Ratings | A+ Stable |
| NICE Credit Rating | ||
| Jul 2021 | Korea Ratings | A+ Stable |
| Jun 2021 | NICE Credit Rating | A+ Stable |
| Jun 2020 | Korea Ratings | A+ Stable |
| NICE Credit Rating | ||
| Oct 2019 | Korea Ratings | A+ Stable |
| NICE Credit Rating |