| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.54/5 | 4.12/5 |
| Vol 2 | 2.74/5 | 4.36/5 |
| Vol 3 | 2.67/5 | 4.47/5 |
| Vol 4 | 2.38/5 | 4.36/5 |
| Vol 5 | 2.72/5 | 4.41/5 |
| Vol 6 | 2.53/5 | 4.30/5 |
| Vol 7 | 2.29/5 | 4.06/5 |
| Vol 8 | 2.61/5 | 4.35/5 |
| Vol 9 | 3.04/5 | 4.40/5 |
| Vol 10 | 2.83/5 | 4.29/5 |
| Vol 11 | 2.74/5 | 4.21/5 |
| Vol 12 | 2.62/5 | 4.17/5 |
| Vol 13 | 2.63/5 | 4.27/5 |
| Vol 14 | 2.69/5 | 4.30/5 |
| Vol 15 | 2.61/5 | 4.21/5 |
| Vol 16 | 2.94/5 | 4.38/5 |
| Vol 17 | 2.60/5 | 4.17/5 |
| Vol 18 | 3.48/5 | 4.51/5 |
| Overall | 2.70/5 | 4.51/5 |