| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.39/5 | 4.24/5 |
| Vol 2 | 3.31/5 | 4.08/5 |
| Vol 3 | 3.30/5 | 4.07/5 |
| Vol 4 | 3.29/5 | 4.02/5 |
| Vol 5 | 3.44/5 | 4.37/5 |
| Vol 6 | 3.29/5 | 4.11/5 |
| Vol 7 | 3.35/5 | 4.12/5 |
| Vol 8 | 3.37/5 | 4.32/5 |
| Vol 9 | 3.33/5 | 4.09/5 |
| Vol 10 | 3.18/5 | 4.18/5 |
| Vol 11 | 3.44/5 | 4.22/5 |
| Vol 12 | 3.52/5 | 4.26/5 |
| Vol 13 | 3.43/5 | 4.27/5 |
| Overall | 3.36/5 | 4.37/5 |