| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.56/5 | 4.36/5 |
| Vol 2 | 3.22/5 | 4.09/5 |
| Vol 3 | 3.47/5 | 4.19/5 |
| Vol 4 | 3.15/5 | 4.12/5 |
| Vol 5 | 3.28/5 | 4.21/5 |
| Vol 6 | 3.40/5 | 4.15/5 |
| Vol 7 | 3.42/5 | 4.05/5 |
| Vol 8 | 3.38/5 | 4.12/5 |
| Vol 9 | 3.24/5 | 4.15/5 |
| Vol 10 | 3.42/5 | 4.13/5 |
| Vol 11 | 3.40/5 | 4.30/5 |
| Vol 12 | 3.39/5 | 4.13/5 |
| Vol 13 | 3.44/5 | 4.27/5 |
| Overall | 3.37/5 | 4.36/5 |