| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.73/5 | 4.06/5 |
| Vol 2 | 2.78/5 | 3.99/5 |
| Vol 3 | 2.80/5 | 4.12/5 |
| Vol 4 | 3.00/5 | 4.27/5 |
| Vol 5 | 3.17/5 | 4.36/5 |
| Vol 6 | 2.52/5 | 4.05/5 |
| Vol 7 | 3.24/5 | 4.62/5 |
| Vol 8 | 3.04/5 | 4.51/5 |
| Vol 9 | 3.19/5 | 4.59/5 |
| Vol 10 | 2.86/5 | 4.24/5 |
| Vol 11 | 3.30/5 | 4.54/5 |
| Vol 12 | 3.13/5 | 4.38/5 |
| Vol 13 | 2.96/5 | 4.12/5 |
| Overall | 2.98/5 | 4.62/5 |