| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.43/5 | 3.89/5 |
| Vol 2 | 2.33/5 | 3.75/5 |
| Vol 3 | 2.53/5 | 4.21/5 |
| Vol 4 | 2.64/5 | 4.06/5 |
| Vol 5 | 2.33/5 | 3.79/5 |
| Vol 6 | 2.53/5 | 4.17/5 |
| Vol 7 | 2.42/5 | 4.09/5 |
| Vol 8 | 2.38/5 | 4.03/5 |
| Vol 9 | 2.68/5 | 4.23/5 |
| Vol 10 | 2.66/5 | 4.12/5 |
| Vol 11 | 2.47/5 | 4.14/5 |
| Vol 12 | 2.79/5 | 4.09/5 |
| Vol 13 | 2.88/5 | 4.39/5 |
| Vol 14 | 2.55/5 | 4.14/5 |
| Vol 15 | 2.62/5 | 4.21/5 |
| Vol 16 | 2.45/5 | 4.25/5 |
| Vol 17 | 2.56/5 | 3.96/5 |
| Vol 18 | 3.04/5 | 4.39/5 |
| Vol 19 | 2.38/5 | 4.14/5 |
| Vol 20 | 2.89/5 | 4.35/5 |
| Overall | 2.58/5 | 4.39/5 |