| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.70/5 | 4.51/5 |
| Vol 2 | 2.46/5 | 4.22/5 |
| Vol 3 | 2.78/5 | 4.47/5 |
| Vol 4 | 2.94/5 | 4.48/5 |
| Vol 5 | 2.87/5 | 4.35/5 |
| Vol 6 | 2.89/5 | 4.50/5 |
| Vol 7 | 2.61/5 | 4.17/5 |
| Vol 8 | 2.69/5 | 4.35/5 |
| Vol 9 | 3.02/5 | 4.45/5 |
| Vol 10 | 3.16/5 | 4.36/5 |
| Vol 11 | 3.20/5 | 4.48/5 |
| Vol 12 | 2.97/5 | 4.56/5 |
| Vol 13 | 2.96/5 | 4.54/5 |
| Vol 14 | 2.68/5 | 4.30/5 |
| Vol 15 | 3.03/5 | 4.26/5 |
| Vol 16 | 2.89/5 | 4.40/5 |
| Overall | 2.86/5 | 4.56/5 |