| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.75/5 | 4.38/5 |
| Vol 2 | 3.08/5 | 4.46/5 |
| Vol 3 | 3.53/5 | 4.55/5 |
| Vol 4 | 2.94/5 | 4.43/5 |
| Vol 5 | 3.00/5 | 4.46/5 |
| Vol 6 | 3.18/5 | 4.47/5 |
| Vol 7 | 3.21/5 | 4.53/5 |
| Vol 8 | 3.75/5 | 4.57/5 |
| Vol 9 | 2.83/5 | 4.36/5 |
| Vol 10 | 3.39/5 | 4.46/5 |
| Vol 11 | 2.82/5 | 4.39/5 |
| Vol 12 | 3.62/5 | 4.55/5 |
| Vol 13 | 3.14/5 | 4.41/5 |
| Vol 14 | 3.42/5 | 4.53/5 |
| Vol 15 | 4.04/5 | 4.62/5 |
| Vol 16 | 3.50/5 | 4.56/5 |
| Vol 17 | 3.33/5 | 4.52/5 |
| Vol 18 | 3.11/5 | 4.48/5 |
| Vol 19 | 3.79/5 | 4.58/5 |
| Overall | 3.29/5 | 4.62/5 |