| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.07/5 | 4.44/5 |
| Vol 2 | 3.21/5 | 4.59/5 |
| Vol 3 | 2.71/5 | 4.25/5 |
| Vol 4 | 3.16/5 | 4.53/5 |
| Vol 5 | 2.33/5 | 3.84/5 |
| Vol 6 | 3.21/5 | 4.57/5 |
| Vol 7 | 3.15/5 | 4.44/5 |
| Vol 8 | 2.65/5 | 3.81/5 |
| Vol 9 | 3.13/5 | 4.44/5 |
| Vol 10 | 2.88/5 | 4.31/5 |
| Vol 11 | 2.64/5 | 4.09/5 |
| Vol 12 | 2.54/5 | 4.46/5 |
| Vol 13 | 2.71/5 | 3.88/5 |
| Vol 14 | 3.00/5 | 4.58/5 |
| Vol 15 | 3.71/5 | 4.68/5 |
| Vol 16 | 3.42/5 | 4.20/5 |
| Vol 17 | 2.77/5 | 4.28/5 |
| Vol 18 | 2.91/5 | 4.51/5 |
| Overall | 2.95/5 | 4.68/5 |