| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 1.99/5 | 3.10/5 |
| Vol 2 | 2.18/5 | 3.28/5 |
| Vol 3 | 1.97/5 | 3.13/5 |
| Vol 4 | 2.02/5 | 3.12/5 |
| Vol 5 | 1.81/5 | 3.05/5 |
| Vol 6 | 2.01/5 | 3.24/5 |
| Vol 7 | 1.96/5 | 3.08/5 |
| Vol 8 | 2.05/5 | 3.07/5 |
| Vol 9 | 2.21/5 | 3.16/5 |
| Vol 10 | 2.07/5 | 3.19/5 |
| Vol 11 | 2.02/5 | 3.15/5 |
| Vol 12 | 2.25/5 | 3.25/5 |
| Vol 13 | 2.00/5 | 3.07/5 |
| Overall | 2.04/5 | 3.28/5 |