| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.49/5 | 3.66/5 |
| Vol 2 | 2.41/5 | 3.52/5 |
| Vol 3 | 2.36/5 | 3.42/5 |
| Vol 4 | 2.69/5 | 3.90/5 |
| Vol 5 | 2.31/5 | 3.39/5 |
| Vol 6 | 2.02/5 | 3.03/5 |
| Vol 7 | 2.42/5 | 3.62/5 |
| Vol 8 | 2.27/5 | 3.43/5 |
| Vol 9 | 2.24/5 | 3.40/5 |
| Vol 10 | 2.00/5 | 3.12/5 |
| Vol 11 | 2.23/5 | 3.45/5 |
| Vol 12 | 2.28/5 | 3.46/5 |
| Vol 13 | 2.49/5 | 3.52/5 |
| Vol 14 | 2.07/5 | 3.10/5 |
| Vol 15 | 2.09/5 | 3.48/5 |
| Vol 16 | 2.30/5 | 3.68/5 |
| Vol 17 | 2.01/5 | 3.22/5 |
| Vol 18 | 2.60/5 | 3.54/5 |
| Vol 19 | 2.57/5 | 3.65/5 |
| Vol 20 | 2.39/5 | 3.67/5 |
| Vol 21 | 2.21/5 | 3.39/5 |
| Vol 22 | 2.64/5 | 3.85/5 |
| Vol 23 | 2.64/5 | 3.85/5 |
| Overall | 2.35/5 | 3.90/5 |