| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.53/5 | 3.18/5 |
| Vol 2 | 2.54/5 | 3.15/5 |
| Vol 3 | 2.58/5 | 3.27/5 |
| Vol 4 | 2.56/5 | 3.13/5 |
| Vol 5 | 2.52/5 | 3.28/5 |
| Vol 6 | 2.52/5 | 3.01/5 |
| Vol 7 | 2.54/5 | 3.18/5 |
| Vol 8 | 2.52/5 | 2.90/5 |
| Vol 9 | 2.48/5 | 2.98/5 |
| Vol 10 | 2.51/5 | 2.97/5 |
| Vol 11 | 2.51/5 | 2.98/5 |
| Vol 12 | 2.46/5 | 2.91/5 |
| Vol 13 | 2.50/5 | 2.96/5 |
| Vol 14 | 2.50/5 | 3.04/5 |
| Vol 15 | 2.60/5 | 3.53/5 |
| Vol 16 | 2.51/5 | 2.91/5 |
| Vol 17 | 2.34/5 | 2.81/5 |
| Overall | 2.51/5 | 3.53/5 |