| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.13/5 | 4.09/5 |
| Vol 2 | 3.06/5 | 4.00/5 |
| Vol 3 | 3.24/5 | 4.13/5 |
| Vol 4 | 3.03/5 | 3.86/5 |
| Vol 5 | 3.16/5 | 3.93/5 |
| Vol 6 | 3.09/5 | 4.00/5 |
| Vol 7 | 3.36/5 | 4.09/5 |
| Vol 8 | 2.91/5 | 3.74/5 |
| Vol 9 | 3.29/5 | 3.93/5 |
| Vol 10 | 3.13/5 | 3.85/5 |
| Vol 11 | 3.31/5 | 4.22/5 |
| Vol 12 | 3.30/5 | 4.06/5 |
| Vol 13 | 3.28/5 | 4.11/5 |
| Overall | 3.18/5 | 4.22/5 |