"Period","Pipe","Brush"
1,6.64,9.73
2,7.89,8.21
3,1.83,2.17
4,.42,.75
5,.85,1.61
6,.29,.75
7,.57,.83
8,.63,.56
9,.32,.76
10,.37,.32
11,0,.48
12,.11,.52
13,4.86,5.38
14,1.8,2.33
15,.23,.91
16,.58,.79