| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.30/5 | 4.15/5 |
| Vol 2 | 3.22/5 | 3.99/5 |
| Vol 3 | 3.21/5 | 3.98/5 |
| Vol 4 | 3.20/5 | 3.93/5 |
| Vol 5 | 3.35/5 | 4.28/5 |
| Vol 6 | 3.20/5 | 4.02/5 |
| Vol 7 | 3.26/5 | 4.03/5 |
| Vol 8 | 3.28/5 | 4.23/5 |
| Vol 9 | 3.24/5 | 4.00/5 |
| Vol 10 | 3.09/5 | 4.09/5 |
| Vol 11 | 3.35/5 | 4.13/5 |
| Vol 12 | 3.43/5 | 4.17/5 |
| Vol 13 | 3.34/5 | 4.18/5 |
| Overall | 3.26/5 | 4.28/5 |