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