| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.15/5 | 3.55/5 |
| Vol 2 | 2.13/5 | 4.27/5 |
| Vol 3 | 2.06/5 | 3.88/5 |
| Vol 4 | 2.11/5 | 3.50/5 |
| Vol 5 | 2.02/5 | 2.98/5 |
| Vol 6 | 2.28/5 | 3.50/5 |
| Vol 7 | 2.26/5 | 4.09/5 |
| Vol 8 | 2.03/5 | 3.86/5 |
| Vol 9 | 2.46/5 | 4.19/5 |
| Vol 10 | 2.17/5 | 3.45/5 |
| Vol 11 | 2.23/5 | 4.06/5 |
| Vol 12 | 2.33/5 | 3.84/5 |
| Vol 13 | 2.54/5 | 4.44/5 |
| Vol 14 | 2.48/5 | 4.45/5 |
| Vol 15 | 1.85/5 | 4.27/5 |
| Overall | 2.21/5 | 4.45/5 |