Interval	L	M	S	-3 SD	-2 SD	-1 SD	Median	1 SD	2 SD	3 SD
0-4 mo	0.3279	7.1133	0.1244	4.8	5.5	6.3	7.1	8	9	10.1
1-5 mo	0.4212	5.4806	0.12713	3.6	4.2	4.8	5.5	6.2	7	7.8
2-6 mo	0.5076	4.2702	0.13454	2.7	3.2	3.7	4.3	4.9	5.5	6.2
3-7 mo	0.584	3.5185	0.14592	2.1	2.6	3	3.5	4	4.6	5.2
4-8 mo	0.6557	2.9255	0.16106	1.6	2	2.5	2.9	3.4	3.9	4.5
5-9 mo	0.7179	2.4506	0.17841	1.2	1.6	2	2.5	2.9	3.4	3.9
6-10 mo	0.7719	2.078	0.19784	0.9	1.3	1.7	2.1	2.5	2.9	3.4
7-11 mo	0.818	1.7696	0.21918	0.7	1	1.4	1.8	2.2	2.6	3
8-12 mo	0.8532	1.5301	0.24082	0.5	0.8	1.2	1.5	1.9	2.3	2.7
9-13 mo	0.8808	1.3368	0.26394	0.3	0.7	1	1.3	1.7	2.1	2.4
10-14 mo	0.9009	1.1844	0.28656	0.2	0.5	0.9	1.2	1.5	1.9	2.2
11-15 mo	0.9166	1.0457	0.3097	0.1	0.4	0.7	1	1.4	1.7	2
12-16 mo	0.9278	0.9301	0.33162	0.1	0.3	0.6	0.9	1.2	1.6	1.9
13-17 mo	0.9357	0.8359	0.35292	0	0.3	0.5	0.8	1.1	1.4	1.7
14-18 mo	0.9414	0.7605	0.37421	0	0.2	0.5	0.8	1	1.3	1.6
15-19 mo	0.9452	0.707	0.39409	0	0.2	0.4	0.7	1	1.3	1.6
16-20 mo	0.948	0.6637	0.41387	0	0.1	0.4	0.7	0.9	1.2	1.5
17-21 mo	0.95	0.6277	0.43237	0	0.1	0.4	0.6	0.9	1.2	1.5
18-22 mo	0.9518	0.5923	0.45102	0	0.1	0.3	0.6	0.9	1.1	1.4
19-23 mo	0.9535	0.5575	0.46942	0	0.1	0.3	0.6	0.8	1.1	1.4
20-24 mo	0.955	0.5248	0.48711	0	0	0.3	0.5	0.8	1	1.3