Age(yr)	Diameter(in)
4	1.8
5	1.8
8	2.2
8	4.4
8	6.6
10	4.4
10	7.7
12	10.8
13	7.7
14	5.5
16	9.9
18	10.1
20	12.1
22	12.8
23	10.3
25	14.3
28	13.2
29	9.9
30	13.2
30	15.4
33	17.6
34	14.3
35	15.4
38	11.0
38	15.4
40	16.5
42	16.5