| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.59/5 | 4.33/5 |
| Vol 2 | 2.48/5 | 4.09/5 |
| Vol 3 | 2.35/5 | 3.90/5 |
| Vol 4 | 2.42/5 | 4.12/5 |
| Vol 5 | 2.54/5 | 4.40/5 |
| Vol 6 | 2.89/5 | 4.49/5 |
| Vol 7 | 2.48/5 | 4.29/5 |
| Vol 8 | 3.27/5 | 4.53/5 |
| Vol 9 | 2.74/5 | 4.40/5 |
| Vol 10 | 3.33/5 | 4.55/5 |
| Vol 11 | 3.32/5 | 4.50/5 |
| Vol 12 | 2.79/5 | 4.42/5 |
| Vol 13 | 2.75/5 | 4.45/5 |
| Vol 14 | 2.69/5 | 4.46/5 |
| Vol 15 | 2.79/5 | 4.46/5 |
| Vol 16 | 2.97/5 | 4.54/5 |
| Vol 17 | 4.04/5 | 4.62/5 |
| Vol 18 | 3.54/5 | 4.57/5 |
| Vol 19 | 3.25/5 | 4.57/5 |
| Vol 20 | 2.86/5 | 4.46/5 |
| Overall | 2.90/5 | 4.62/5 |