| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.41/5 | 3.90/5 |
| Vol 2 | 3.19/5 | 3.79/5 |
| Vol 3 | 3.36/5 | 3.94/5 |
| Vol 4 | 3.38/5 | 4.08/5 |
| Vol 5 | 3.38/5 | 3.97/5 |
| Vol 6 | 3.32/5 | 4.05/5 |
| Vol 7 | 3.33/5 | 3.99/5 |
| Vol 8 | 3.41/5 | 3.99/5 |
| Vol 9 | 3.37/5 | 4.11/5 |
| Vol 10 | 3.41/5 | 4.13/5 |
| Vol 11 | 3.41/5 | 3.95/5 |
| Vol 12 | 3.28/5 | 3.86/5 |
| Vol 13 | 3.35/5 | 3.89/5 |
| Vol 14 | 3.35/5 | 3.88/5 |
| Overall | 3.35/5 | 4.13/5 |