| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.84/5 | 4.37/5 |
| Vol 2 | 3.16/5 | 4.41/5 |
| Vol 3 | 3.01/5 | 4.45/5 |
| Vol 4 | 3.47/5 | 4.50/5 |
| Vol 5 | 3.69/5 | 4.51/5 |
| Vol 6 | 4.05/5 | 4.58/5 |
| Vol 7 | 3.89/5 | 4.53/5 |
| Vol 8 | 3.82/5 | 4.53/5 |
| Vol 9 | 3.80/5 | 4.53/5 |
| Vol 10 | 3.46/5 | 4.47/5 |
| Vol 11 | 3.83/5 | 4.53/5 |
| Vol 12 | 3.14/5 | 4.43/5 |
| Vol 13 | 3.98/5 | 4.56/5 |
| Vol 14 | 3.74/5 | 4.52/5 |
| Vol 15 | 4.04/5 | 4.58/5 |
| Vol 16 | 3.59/5 | 4.49/5 |
| Vol 17 | 3.97/5 | 4.55/5 |
| Vol 18 | 4.00/5 | 4.56/5 |
| Vol 19 | 4.08/5 | 4.60/5 |
| Vol 20 | 4.01/5 | 4.57/5 |
| Overall | 3.66/5 | 4.60/5 |