| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.52/5 | 4.51/5 |
| Vol 2 | 2.39/5 | 4.21/5 |
| Vol 3 | 2.22/5 | 3.75/5 |
| Vol 4 | 2.56/5 | 4.47/5 |
| Vol 5 | 2.01/5 | 3.51/5 |
| Vol 6 | 2.57/5 | 4.47/5 |
| Vol 7 | 2.34/5 | 4.27/5 |
| Vol 8 | 2.20/5 | 4.24/5 |
| Vol 9 | 2.43/5 | 4.40/5 |
| Vol 10 | 2.27/5 | 4.32/5 |
| Vol 11 | 2.05/5 | 4.34/5 |
| Vol 12 | 2.78/5 | 4.45/5 |
| Overall | 2.38/5 | 4.51/5 |