| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.24/5 | 3.84/5 |
| Vol 2 | 2.58/5 | 3.79/5 |
| Vol 3 | 2.63/5 | 4.00/5 |
| Vol 4 | 2.34/5 | 3.93/5 |
| Vol 5 | 2.57/5 | 4.17/5 |
| Vol 6 | 2.68/5 | 4.32/5 |
| Vol 7 | 2.55/5 | 4.17/5 |
| Vol 8 | 2.70/5 | 4.32/5 |
| Vol 9 | 2.95/5 | 4.25/5 |
| Vol 10 | 2.36/5 | 4.17/5 |
| Vol 11 | 2.55/5 | 3.95/5 |
| Vol 12 | 2.78/5 | 4.21/5 |
| Vol 13 | 2.56/5 | 4.14/5 |
| Vol 14 | 3.28/5 | 4.52/5 |
| Vol 15 | 3.18/5 | 4.51/5 |
| Overall | 2.66/5 | 4.52/5 |