| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.89/5 | 3.85/5 |
| Vol 2 | 3.27/5 | 4.03/5 |
| Vol 3 | 3.28/5 | 4.30/5 |
| Vol 4 | 3.28/5 | 3.94/5 |
| Vol 5 | 3.14/5 | 4.00/5 |
| Vol 6 | 3.27/5 | 4.25/5 |
| Vol 7 | 3.35/5 | 4.13/5 |
| Vol 8 | 3.16/5 | 4.04/5 |
| Vol 9 | 3.31/5 | 4.23/5 |
| Vol 10 | 3.10/5 | 3.99/5 |
| Vol 11 | 3.27/5 | 4.21/5 |
| Vol 12 | 3.36/5 | 4.34/5 |
| Vol 13 | 3.30/5 | 4.20/5 |
| Vol 14 | 3.37/5 | 4.25/5 |
| Vol 15 | 3.22/5 | 4.12/5 |
| Vol 16 | 3.46/5 | 4.32/5 |
| Overall | 3.25/5 | 4.34/5 |