| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.76/5 | 4.21/5 |
| Vol 2 | 2.81/5 | 4.14/5 |
| Vol 3 | 2.88/5 | 4.14/5 |
| Vol 4 | 3.22/5 | 4.51/5 |
| Vol 5 | 3.00/5 | 4.41/5 |
| Vol 6 | 3.52/5 | 4.51/5 |
| Vol 7 | 3.50/5 | 4.45/5 |
| Vol 8 | 3.33/5 | 4.32/5 |
| Vol 9 | 3.16/5 | 4.38/5 |
| Vol 10 | 3.30/5 | 4.46/5 |
| Vol 11 | 3.31/5 | 4.45/5 |
| Vol 12 | 3.42/5 | 4.51/5 |
| Vol 13 | 3.34/5 | 4.46/5 |
| Vol 14 | 3.25/5 | 4.56/5 |
| Vol 15 | 3.68/5 | 4.57/5 |
| Overall | 3.23/5 | 4.57/5 |