| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.50/5 | 3.61/5 |
| Vol 2 | 2.73/5 | 4.36/5 |
| Vol 3 | 2.93/5 | 4.33/5 |
| Vol 4 | 2.71/5 | 4.13/5 |
| Vol 5 | 2.84/5 | 4.47/5 |
| Vol 6 | 2.71/5 | 4.27/5 |
| Vol 7 | 2.76/5 | 4.29/5 |
| Vol 8 | 2.98/5 | 4.37/5 |
| Vol 9 | 2.75/5 | 4.31/5 |
| Vol 10 | 2.87/5 | 4.46/5 |
| Vol 11 | 2.88/5 | 4.46/5 |
| Vol 12 | 3.29/5 | 4.54/5 |
| Vol 13 | 3.24/5 | 4.49/5 |
| Vol 14 | 2.84/5 | 4.40/5 |
| Vol 15 | 2.86/5 | 4.44/5 |
| Overall | 2.86/5 | 4.54/5 |