| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.78/5 | 4.36/5 |
| Vol 2 | 2.98/5 | 4.60/5 |
| Vol 3 | 2.91/5 | 4.71/5 |
| Vol 4 | 2.62/5 | 4.60/5 |
| Vol 5 | 2.96/5 | 4.65/5 |
| Vol 6 | 2.77/5 | 4.54/5 |
| Vol 7 | 2.53/5 | 4.30/5 |
| Vol 8 | 2.85/5 | 4.59/5 |
| Vol 9 | 3.28/5 | 4.64/5 |
| Vol 10 | 3.07/5 | 4.53/5 |
| Vol 11 | 2.98/5 | 4.45/5 |
| Vol 12 | 2.86/5 | 4.41/5 |
| Vol 13 | 2.87/5 | 4.51/5 |
| Vol 14 | 2.93/5 | 4.54/5 |
| Vol 15 | 2.85/5 | 4.45/5 |
| Vol 16 | 3.18/5 | 4.62/5 |
| Vol 17 | 2.84/5 | 4.41/5 |
| Vol 18 | 3.72/5 | 4.75/5 |
| Overall | 2.97/5 | 4.75/5 |