Fraction
above natural
<0.01
0.01–0.02
0.02–0.04
0.04–0.08
0.08–0.16
0.16–0.32
0.32–0.64
0.64–1.28
1.28–2.56
1.28–5.12
5.12–10.24
10.24–20.5
20.5–41
>41