| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.35/5 | 4.25/5 |
| Vol 2 | 3.18/5 | 4.28/5 |
| Vol 3 | 3.37/5 | 4.28/5 |
| Vol 4 | 3.50/5 | 4.41/5 |
| Vol 5 | 3.70/5 | 4.48/5 |
| Vol 6 | 3.10/5 | 4.27/5 |
| Vol 7 | 3.36/5 | 4.32/5 |
| Vol 8 | 3.35/5 | 4.31/5 |
| Vol 9 | 3.09/5 | 4.05/5 |
| Vol 10 | 3.14/5 | 4.18/5 |
| Vol 11 | 3.28/5 | 4.24/5 |
| Vol 12 | 3.05/5 | 4.19/5 |
| Overall | 3.29/5 | 4.27/5 |