| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.29/5 | 4.27/5 |
| Vol 2 | 2.35/5 | 3.41/5 |
| Vol 3 | 2.45/5 | 3.25/5 |
| Vol 4 | 2.39/5 | 3.25/5 |
| Vol 5 | 2.57/5 | 3.52/5 |
| Vol 6 | 2.47/5 | 3.67/5 |
| Vol 7 | 2.41/5 | 3.60/5 |
| Vol 8 | 2.29/5 | 4.27/5 |
| Vol 9 | 2.49/5 | 3.94/5 |
| Vol 10 | 2.64/5 | 4.27/5 |
| Vol 11 | 2.48/5 | 3.52/5 |
| Vol 12 | 2.42/5 | 3.19/5 |
| Vol 13 | 2.58/5 | 4.46/5 |
| Vol 14 | 2.51/5 | 4.07/5 |
| Vol 15 | 2.43/5 | 4.00/5 |
| Overall | 2.45/5 | 4.46/5 |