| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.48/5 | 4.08/5 |
| Vol 2 | 2.82/5 | 4.03/5 |
| Vol 3 | 2.87/5 | 4.24/5 |
| Vol 4 | 2.58/5 | 4.17/5 |
| Vol 5 | 2.81/5 | 4.41/5 |
| Vol 6 | 2.92/5 | 4.56/5 |
| Vol 7 | 2.79/5 | 4.41/5 |
| Vol 8 | 2.94/5 | 4.56/5 |
| Vol 9 | 3.19/5 | 4.49/5 |
| Vol 10 | 2.60/5 | 4.41/5 |
| Vol 11 | 2.79/5 | 4.19/5 |
| Vol 12 | 3.02/5 | 4.45/5 |
| Vol 13 | 2.80/5 | 4.38/5 |
| Vol 14 | 3.52/5 | 4.76/5 |
| Vol 15 | 3.42/5 | 4.75/5 |
| Overall | 2.95/5 | 4.76/5 |