| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.83/5 | 4.41/5 |
| Vol 2 | 3.09/5 | 4.59/5 |
| Vol 3 | 2.79/5 | 4.37/5 |
| Vol 4 | 2.91/5 | 4.51/5 |
| Vol 5 | 3.10/5 | 4.58/5 |
| Vol 6 | 2.91/5 | 4.61/5 |
| Vol 7 | 2.82/5 | 4.53/5 |
| Vol 8 | 2.99/5 | 4.59/5 |
| Vol 9 | 2.84/5 | 4.56/5 |
| Vol 10 | 2.99/5 | 4.59/5 |
| Vol 11 | 3.05/5 | 4.62/5 |
| Vol 12 | 3.07/5 | 4.43/5 |
| Vol 13 | 3.30/5 | 4.60/5 |
| Vol 14 | 3.45/5 | 4.67/5 |
| Vol 15 | 3.16/5 | 4.62/5 |
| Overall | 3.03/5 | 4.67/5 |