| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.64/5 | 4.38/5 |
| Vol 2 | 2.69/5 | 4.36/5 |
| Vol 3 | 2.55/5 | 4.19/5 |
| Vol 4 | 2.57/5 | 4.09/5 |
| Vol 5 | 2.49/5 | 4.06/5 |
| Vol 6 | 2.48/5 | 4.23/5 |
| Vol 7 | 2.58/5 | 4.32/5 |
| Vol 8 | 2.52/5 | 4.33/5 |
| Vol 9 | 2.56/5 | 4.19/5 |
| Vol 10 | 2.64/5 | 4.48/5 |
| Vol 11 | 2.31/5 | 4.19/5 |
| Vol 12 | 2.59/5 | 4.42/5 |
| Vol 13 | 2.37/5 | 3.72/5 |
| Vol 14 | 2.59/5 | 4.29/5 |
| Vol 15 | 2.62/5 | 4.21/5 |
| Overall | 2.55/5 | 4.48/5 |