| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.56/5 | 4.20/5 |
| Vol 2 | 2.62/5 | 4.17/5 |
| Vol 3 | 2.57/5 | 4.21/5 |
| Vol 4 | 2.56/5 | 4.27/5 |
| Vol 5 | 2.38/5 | 4.15/5 |
| Vol 6 | 2.59/5 | 4.34/5 |
| Vol 7 | 2.63/5 | 4.38/5 |
| Vol 8 | 3.36/5 | 4.55/5 |
| Vol 9 | 2.69/5 | 4.32/5 |
| Vol 10 | 2.40/5 | 4.28/5 |
| Vol 11 | 2.81/5 | 4.47/5 |
| Vol 12 | 2.18/5 | 2.99/5 |
| Vol 13 | 2.33/5 | 4.09/5 |
| Vol 14 | 2.29/5 | 3.90/5 |
| Vol 15 | 2.64/5 | 4.06/5 |
| Vol 16 | 2.70/5 | 4.29/5 |
| Vol 17 | 2.62/5 | 4.32/5 |
| Vol 18 | 2.79/5 | 4.28/5 |
| Vol 19 | 4.14/5 | 4.66/5 |
| Vol 20 | 3.36/5 | 4.55/5 |
| Vol 21 | 2.95/5 | 4.54/5 |
| Vol 22 | 3.06/5 | 4.52/5 |
| Vol 23 | 2.83/5 | 4.50/5 |
| Overall | 2.74/5 | 4.66/5 |