| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.43/5 | 4.13/5 |
| Vol 2 | 2.34/5 | 4.27/5 |
| Vol 3 | 2.56/5 | 4.40/5 |
| Vol 4 | 2.38/5 | 4.12/5 |
| Vol 5 | 3.01/5 | 4.51/5 |
| Vol 6 | 3.60/5 | 4.66/5 |
| Vol 7 | 2.95/5 | 4.57/5 |
| Vol 8 | 2.95/5 | 4.63/5 |
| Vol 9 | 2.53/5 | 4.14/5 |
| Vol 10 | 2.57/5 | 4.29/5 |
| Vol 11 | 2.85/5 | 4.56/5 |
| Vol 12 | 2.80/5 | 4.35/5 |
| Vol 13 | 2.76/5 | 4.32/5 |
| Vol 14 | 2.85/5 | 4.41/5 |
| Overall | 2.74/5 | 4.66/5 |