| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.57/5 | 3.95/5 |
| Vol 2 | 2.73/5 | 4.34/5 |
| Vol 3 | 2.45/5 | 4.08/5 |
| Vol 4 | 2.43/5 | 3.18/5 |
| Vol 5 | 2.73/5 | 4.37/5 |
| Vol 6 | 2.80/5 | 4.48/5 |
| Vol 7 | 2.29/5 | 4.06/5 |
| Vol 8 | 2.65/5 | 4.26/5 |
| Vol 9 | 2.46/5 | 3.68/5 |
| Vol 10 | 2.52/5 | 4.00/5 |
| Vol 11 | 2.53/5 | 3.63/5 |
| Vol 12 | 2.65/5 | 4.42/5 |
| Vol 13 | 2.66/5 | 4.39/5 |
| Vol 14 | 2.84/5 | 4.45/5 |
| Vol 15 | 2.40/5 | 3.87/5 |
| Vol 16 | 2.65/5 | 4.34/5 |
| Vol 17 | 2.44/5 | 4.01/5 |
| Vol 18 | 2.60/5 | 3.84/5 |
| Vol 19 | 2.57/5 | 4.26/5 |
| Vol 20 | 2.56/5 | 4.39/5 |
| Vol 21 | 2.83/5 | 4.45/5 |
| Overall | 2.58/5 | 4.48/5 |