| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.61/5 | 4.35/5 |
| Vol 2 | 2.76/5 | 4.45/5 |
| Vol 3 | 2.37/5 | 4.35/5 |
| Vol 4 | 2.47/5 | 4.40/5 |
| Vol 5 | 2.56/5 | 4.41/5 |
| Vol 6 | 2.62/5 | 4.51/5 |
| Vol 7 | 4.16/5 | 4.66/5 |
| Vol 8 | 2.50/5 | 4.48/5 |
| Vol 9 | 2.39/5 | 4.46/5 |
| Vol 10 | 2.25/5 | 4.44/5 |
| Vol 11 | 2.40/5 | 4.38/5 |
| Vol 12 | 2.40/5 | 4.34/5 |
| Vol 13 | 2.37/5 | 4.38/5 |
| Vol 14 | 2.34/5 | 4.23/5 |
| Vol 15 | 2.44/5 | 4.41/5 |
| Overall | 2.58/5 | 4.66/5 |