Number of layers=24
2.5
2.8
3.1
3.5
3.9
4.4
5.0
5.6
6.2
7.0
7.8
8.8
9.9
11.0
12.4
13.9
15.6
17.4
19.6
21.9
24.6
27.6
30.9
34.6