| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.72/5 | 3.88/5 |
| Vol 2 | 2.72/5 | 3.89/5 |
| Vol 3 | 2.59/5 | 3.87/5 |
| Vol 4 | 2.76/5 | 3.92/5 |
| Vol 5 | 2.81/5 | 4.01/5 |
| Vol 6 | 2.53/5 | 3.67/5 |
| Vol 7 | 2.56/5 | 3.87/5 |
| Vol 8 | 2.61/5 | 3.93/5 |
| Vol 9 | 2.61/5 | 3.74/5 |
| Vol 10 | 2.59/5 | 3.71/5 |
| Vol 11 | 2.57/5 | 3.66/5 |
| Vol 12 | 2.63/5 | 3.76/5 |
| Vol 13 | 2.57/5 | 3.75/5 |
| Vol 14 | 2.97/5 | 3.96/5 |
| Vol 15 | 2.89/5 | 4.01/5 |
| Overall | 2.68/5 | 4.01/5 |