| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.38/5 | 4.25/5 |
| Vol 2 | 3.52/5 | 4.43/5 |
| Vol 3 | 3.49/5 | 4.40/5 |
| Vol 4 | 3.38/5 | 4.29/5 |
| Vol 5 | 3.55/5 | 4.39/5 |
| Vol 6 | 3.62/5 | 4.46/5 |
| Vol 7 | 3.32/5 | 4.32/5 |
| Vol 8 | 3.56/5 | 4.45/5 |
| Vol 9 | 3.64/5 | 4.48/5 |
| Vol 10 | 3.76/5 | 4.53/5 |
| Vol 11 | 3.71/5 | 4.50/5 |
| Vol 12 | 3.97/5 | 4.59/5 |
| Vol 13 | 3.81/5 | 4.54/5 |
| Vol 14 | 3.26/5 | 4.28/5 |
| Overall | 3.57/5 | 4.59/5 |