| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 1.58/5 | 2.74/5 |
| Vol 2 | 1.65/5 | 2.86/5 |
| Vol 3 | 1.49/5 | 2.70/5 |
| Vol 4 | 1.72/5 | 3.13/5 |
| Vol 5 | 1.71/5 | 2.85/5 |
| Vol 6 | 1.56/5 | 2.86/5 |
| Vol 7 | 1.69/5 | 3.36/5 |
| Vol 8 | 1.50/5 | 2.70/5 |
| Vol 9 | 1.72/5 | 4.14/5 |
| Vol 10 | 1.34/5 | 2.62/5 |
| Vol 11 | 1.60/5 | 4.03/5 |
| Vol 12 | 1.38/5 | 3.00/5 |
| Vol 13 | 1.67/5 | 4.09/5 |
| Vol 14 | 1.33/5 | 2.82/5 |
| Vol 15 | 1.28/5 | 2.58/5 |
| Overall | 1.55/5 | 4.14/5 |