| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.56/5 | 3.79/5 |
| Vol 2 | 2.49/5 | 3.77/5 |
| Vol 3 | 2.60/5 | 3.80/5 |
| Vol 4 | 2.72/5 | 3.80/5 |
| Vol 5 | 2.82/5 | 4.04/5 |
| Vol 6 | 2.72/5 | 3.89/5 |
| Vol 7 | 2.61/5 | 3.78/5 |
| Vol 8 | 2.60/5 | 3.99/5 |
| Vol 9 | 2.54/5 | 3.65/5 |
| Vol 10 | 2.71/5 | 3.75/5 |
| Vol 11 | 2.62/5 | 3.94/5 |
| Vol 12 | 2.59/5 | 3.89/5 |
| Overall | 2.63/5 | 4.04/5 |