| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.36/5 | 3.03/5 |
| Vol 2 | 2.29/5 | 3.00/5 |
| Vol 3 | 2.32/5 | 3.27/5 |
| Vol 4 | 2.33/5 | 3.11/5 |
| Vol 5 | 2.14/5 | 2.95/5 |
| Vol 6 | 2.37/5 | 3.01/5 |
| Vol 7 | 2.27/5 | 2.95/5 |
| Vol 8 | 2.33/5 | 2.94/5 |
| Vol 9 | 2.08/5 | 2.92/5 |
| Vol 10 | 2.45/5 | 3.09/5 |
| Vol 11 | 2.21/5 | 2.94/5 |
| Vol 12 | 2.14/5 | 2.97/5 |
| Vol 13 | 2.10/5 | 2.91/5 |
| Vol 14 | 2.27/5 | 2.96/5 |
| Vol 15 | 2.36/5 | 3.07/5 |
| Overall | 2.27/5 | 3.27/5 |