| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.79/5 | 3.75/5 |
| Vol 2 | 3.17/5 | 3.93/5 |
| Vol 3 | 3.18/5 | 4.20/5 |
| Vol 4 | 3.18/5 | 3.84/5 |
| Vol 5 | 3.04/5 | 3.90/5 |
| Vol 6 | 3.17/5 | 4.15/5 |
| Vol 7 | 3.25/5 | 4.03/5 |
| Vol 8 | 3.06/5 | 3.94/5 |
| Vol 9 | 3.21/5 | 4.13/5 |
| Vol 10 | 3.00/5 | 3.89/5 |
| Vol 11 | 3.17/5 | 4.11/5 |
| Vol 12 | 3.26/5 | 4.24/5 |
| Vol 13 | 3.20/5 | 4.10/5 |
| Vol 14 | 3.27/5 | 4.15/5 |
| Vol 15 | 3.12/5 | 4.02/5 |
| Vol 16 | 3.36/5 | 4.22/5 |
| Overall | 3.15/5 | 4.24/5 |