| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.50/5 | 4.35/5 |
| Vol 2 | 2.59/5 | 4.44/5 |
| Vol 3 | 2.69/5 | 4.45/5 |
| Vol 4 | 2.66/5 | 4.43/5 |
| Vol 5 | 2.76/5 | 4.22/5 |
| Vol 6 | 2.80/5 | 4.09/5 |
| Vol 7 | 2.96/5 | 4.25/5 |
| Vol 8 | 3.29/5 | 4.56/5 |
| Vol 9 | 3.03/5 | 4.45/5 |
| Vol 10 | 2.84/5 | 4.24/5 |
| Vol 11 | 2.99/5 | 4.37/5 |
| Vol 12 | 2.87/5 | 4.39/5 |
| Vol 13 | 2.96/5 | 4.42/5 |
| Vol 14 | 3.03/5 | 4.51/5 |
| Vol 15 | 2.59/5 | 3.77/5 |
| Vol 16 | 2.64/5 | 4.08/5 |
| Vol 17 | 2.81/5 | 4.14/5 |
| Vol 18 | 2.98/5 | 4.28/5 |
| Overall | 2.84/5 | 4.29/5 |