| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.19/5 | 3.95/5 |
| Vol 2 | 3.37/5 | 4.16/5 |
| Vol 3 | 3.47/5 | 4.33/5 |
| Vol 4 | 3.36/5 | 4.19/5 |
| Vol 5 | 3.24/5 | 4.04/5 |
| Vol 6 | 3.33/5 | 4.17/5 |
| Vol 7 | 3.38/5 | 4.18/5 |
| Vol 8 | 3.36/5 | 4.21/5 |
| Vol 9 | 3.48/5 | 4.30/5 |
| Vol 10 | 3.52/5 | 4.38/5 |
| Vol 11 | 3.16/5 | 4.20/5 |
| Vol 12 | 3.15/5 | 4.22/5 |
| Vol 13 | 3.37/5 | 4.23/5 |
| Overall | 3.34/5 | 4.38/5 |