| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.69/5 | 4.35/5 |
| Vol 2 | 3.29/5 | 4.51/5 |
| Vol 3 | 2.93/5 | 4.43/5 |
| Vol 4 | 2.75/5 | 4.35/5 |
| Vol 5 | 2.60/5 | 4.27/5 |
| Vol 6 | 2.95/5 | 4.49/5 |
| Vol 7 | 3.25/5 | 4.56/5 |
| Vol 8 | 2.98/5 | 4.53/5 |
| Vol 9 | 2.73/5 | 4.35/5 |
| Vol 10 | 3.13/5 | 4.50/5 |
| Vol 11 | 2.78/5 | 4.43/5 |
| Vol 12 | 2.79/5 | 4.41/5 |
| Vol 13 | 2.76/5 | 4.42/5 |
| Vol 14 | 2.62/5 | 4.42/5 |
| Vol 15 | 2.74/5 | 4.34/5 |
| Vol 16 | 3.56/5 | 4.55/5 |
| Vol 17 | 3.46/5 | 4.56/5 |
| Vol 18 | 3.28/5 | 4.50/5 |
| Overall | 2.96/5 | 4.56/5 |