| 等级 | A+ | A | A− | B+ | B | B− | C+ | C+ | C− | D |
| 分值区间 | S ≥ 95 | 90 ≤ S < 95 | 85 ≤ S < 90 | 80 ≤ S < 85 | 75 ≤ S < 80 | 70 ≤ S < 75 | 67 ≤ S < 70 | 63 ≤ S < 67 | 60 ≤ S < 63 | S < 60 |