| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.79/5 | 4.03/5 |
| Vol 2 | 2.86/5 | 4.24/5 |
| Vol 3 | 2.95/5 | 4.25/5 |
| Vol 4 | 2.74/5 | 3.99/5 |
| Vol 5 | 2.81/5 | 4.18/5 |
| Vol 6 | 2.49/5 | 4.06/5 |
| Vol 7 | 2.80/5 | 4.06/5 |
| Vol 8 | 2.39/5 | 3.85/5 |
| Vol 9 | 2.66/5 | 4.02/5 |
| Vol 10 | 2.68/5 | 4.06/5 |
| Vol 11 | 2.52/5 | 3.91/5 |
| Vol 12 | 3.03/5 | 4.24/5 |
| Vol 13 | 2.85/5 | 4.10/5 |
| Vol 14 | 2.57/5 | 3.95/5 |
| Vol 15 | 2.60/5 | 3.97/5 |
| Overall | 2.71/5 | 4.25/5 |