| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.27/5 | 4.26/5 |
| Vol 2 | 3.45/5 | 4.33/5 |
| Vol 3 | 3.18/5 | 4.20/5 |
| Vol 4 | 3.47/5 | 4.31/5 |
| Vol 5 | 3.18/5 | 4.15/5 |
| Vol 6 | 3.17/5 | 4.30/5 |
| Vol 7 | 3.29/5 | 4.33/5 |
| Vol 8 | 3.20/5 | 4.11/5 |
| Vol 9 | 3.21/5 | 4.02/5 |
| Vol 10 | 3.14/5 | 4.19/5 |
| Vol 11 | 2.97/5 | 4.00/5 |
| Vol 12 | 3.11/5 | 4.06/5 |
| Vol 13 | 2.99/5 | 4.25/5 |
| Overall | 3.20/5 | 4.33/5 |