
| Stability level | Rating indicator | Grade |
|---|---|---|
| High | AAA | 96-100 up to points |
| AA | 91-95 up to points | |
| A | 86-90 up to points | |
| Medium | BBB | 76-85 up to points |
| BB | 66-75 up to points | |
| B | 56-65 up to points | |
| Satisfactory | CCC | 51-55 up to points |
| CC | 36-50 up to points | |
| C | 26-35 up to points | |
| Low | D | 25 up to points |