| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.34/5 | 4.12/5 |
| Vol 2 | 3.20/5 | 3.92/5 |
| Vol 3 | 3.28/5 | 4.02/5 |
| Vol 4 | 3.38/5 | 4.18/5 |
| Vol 5 | 3.39/5 | 4.25/5 |
| Vol 6 | 3.15/5 | 4.06/5 |
| Vol 7 | 3.06/5 | 3.83/5 |
| Vol 8 | 3.33/5 | 4.21/5 |
| Vol 9 | 3.20/5 | 3.94/5 |
| Vol 10 | 3.36/5 | 4.22/5 |
| Vol 11 | 3.34/5 | 4.28/5 |
| Vol 12 | 3.24/5 | 4.03/5 |
| Overall | 3.28/5 | 4.28/5 |