| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.29/5 | 3.79/5 |
| Vol 2 | 3.33/5 | 3.84/5 |
| Vol 3 | 3.40/5 | 3.87/5 |
| Vol 4 | 3.42/5 | 3.83/5 |
| Vol 5 | 3.43/5 | 3.86/5 |
| Vol 6 | 3.41/5 | 3.85/5 |
| Vol 7 | 3.46/5 | 3.84/5 |
| Vol 8 | 3.33/5 | 3.81/5 |
| Vol 9 | 3.42/5 | 3.86/5 |
| Vol 10 | 3.44/5 | 3.88/5 |
| Vol 11 | 3.33/5 | 3.78/5 |
| Vol 12 | 3.39/5 | 3.84/5 |
| Vol 13 | 3.43/5 | 3.84/5 |
| Vol 14 | 3.41/5 | 3.81/5 |
| Vol 15 | 3.29/5 | 3.78/5 |
| Overall | 3.38/5 | 3.88/5 |