Interval	L	M	S	-3 SD	-2 SD	-1 SD	Median	1 SD	2 SD	3 SD
0-6 mo	0.4441	8.864	0.1101	6.2	7	7.9	8.9	9.9	10.9	12.1
1-7 mo	0.4988	6.9439	0.11688	4.7	5.4	6.2	6.9	7.8	8.7	9.6
2-8 mo	0.5465	5.5066	0.12498	3.6	4.2	4.8	5.5	6.2	7	7.7
3-9 mo	0.5888	4.526	0.13512	2.8	3.4	3.9	4.5	5.2	5.8	6.5
4-10 mo	0.6269	3.7983	0.14708	2.3	2.7	3.3	3.8	4.4	5	5.6
5-11 mo	0.6616	3.2122	0.16026	1.8	2.2	2.7	3.2	3.7	4.3	4.9
6-12 mo	0.6933	2.7354	0.17427	1.4	1.8	2.3	2.7	3.2	3.7	4.3
7-13 mo	0.7226	2.3511	0.18884	1.1	1.5	1.9	2.4	2.8	3.3	3.8
8-14 mo	0.7499	2.0461	0.20363	0.9	1.3	1.6	2	2.5	2.9	3.4
9-15 mo	0.7754	1.7985	0.21837	0.7	1.1	1.4	1.8	2.2	2.6	3.1
10-16 mo	0.7993	1.5932	0.2328	0.6	0.9	1.2	1.6	2	2.4	2.8
11-17 mo	0.8218	1.4211	0.24672	0.5	0.8	1.1	1.4	1.8	2.2	2.5
12-18 mo	0.8431	1.2795	0.26021	0.4	0.6	1	1.3	1.6	2	2.3
13-19 mo	0.8633	1.1676	0.27339	0.3	0.6	0.9	1.2	1.5	1.8	2.2
14-20 mo	0.8825	1.0785	0.28632	0.2	0.5	0.8	1.1	1.4	1.7	2
15-21 mo	0.9009	1.0078	0.29903	0.2	0.4	0.7	1	1.3	1.6	1.9
16-22 mo	0.9184	0.9483	0.31159	0.1	0.4	0.7	0.9	1.2	1.6	1.9
17-23 mo	0.9351	0.8976	0.32406	0.1	0.3	0.6	0.9	1.2	1.5	1.8
18-24 mo	0.9512	0.8511	0.33648	0	0.3	0.6	0.9	1.1	1.4	1.7