| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.21/5 | 4.35/5 |
| Vol 2 | 2.95/5 | 4.14/5 |
| Vol 3 | 3.17/5 | 4.40/5 |
| Vol 4 | 2.89/5 | 4.19/5 |
| Vol 5 | 3.30/5 | 4.38/5 |
| Vol 6 | 3.22/5 | 4.37/5 |
| Vol 7 | 3.15/5 | 4.36/5 |
| Vol 8 | 3.14/5 | 4.23/5 |
| Vol 9 | 3.05/5 | 4.27/5 |
| Vol 10 | 2.97/5 | 4.29/5 |
| Vol 11 | 3.09/5 | 4.30/5 |
| Vol 12 | 3.20/5 | 4.35/5 |
| Vol 13 | 3.10/5 | 4.25/5 |
| Overall | 3.11/5 | 4.40/5 |