| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.41/5 | 3.07/5 |
| Vol 2 | 2.40/5 | 2.92/5 |
| Vol 3 | 2.41/5 | 3.53/5 |
| Vol 4 | 2.43/5 | 3.49/5 |
| Vol 5 | 2.48/5 | 3.53/5 |
| Vol 6 | 2.45/5 | 3.39/5 |
| Vol 7 | 2.44/5 | 3.39/5 |
| Vol 8 | 2.52/5 | 3.52/5 |
| Vol 9 | 2.33/5 | 3.41/5 |
| Vol 10 | 2.37/5 | 3.27/5 |
| Vol 11 | 2.36/5 | 3.15/5 |
| Vol 12 | 2.43/5 | 3.38/5 |
| Vol 13 | 2.35/5 | 2.92/5 |
| Vol 14 | 2.33/5 | 2.89/5 |
| Vol 15 | 2.45/5 | 3.65/5 |
| Vol 16 | 2.33/5 | 3.36/5 |
| Vol 17 | 2.38/5 | 3.40/5 |
| Overall | 2.41/5 | 3.65/5 |