| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.52/5 | 4.23/5 |
| Vol 2 | 3.61/5 | 4.35/5 |
| Vol 3 | 3.48/5 | 4.27/5 |
| Vol 4 | 3.49/5 | 4.19/5 |
| Vol 5 | 3.56/5 | 4.28/5 |
| Vol 6 | 3.42/5 | 4.16/5 |
| Vol 7 | 3.50/5 | 4.30/5 |
| Vol 8 | 3.49/5 | 4.34/5 |
| Vol 9 | 3.50/5 | 4.21/5 |
| Vol 10 | 3.57/5 | 4.38/5 |
| Vol 11 | 3.73/5 | 4.50/5 |
| Vol 12 | 3.71/5 | 4.48/5 |
| Vol 13 | 3.50/5 | 4.27/5 |
| Vol 14 | 3.55/5 | 4.36/5 |
| Vol 15 | 3.60/5 | 4.42/5 |
| Overall | 3.55/5 | 4.50/5 |