| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.15/5 | 3.93/5 |
| Vol 2 | 3.16/5 | 3.97/5 |
| Vol 3 | 3.30/5 | 4.20/5 |
| Vol 4 | 3.33/5 | 4.15/5 |
| Vol 5 | 3.39/5 | 4.21/5 |
| Vol 6 | 3.33/5 | 4.24/5 |
| Vol 7 | 3.31/5 | 4.25/5 |
| Vol 8 | 3.35/5 | 4.22/5 |
| Vol 9 | 3.32/5 | 4.18/5 |
| Vol 10 | 3.36/5 | 4.15/5 |
| Vol 11 | 3.23/5 | 4.12/5 |
| Vol 12 | 3.25/5 | 4.09/5 |
| Vol 13 | 3.19/5 | 4.07/5 |
| Vol 14 | 3.00/5 | 3.95/5 |
| Overall | 3.27/5 | 4.25/5 |