Interval	L	M	S	-3 SD	-2 SD	-1 SD	Median	1 SD	2 SD	3 SD
0-4 mo	0.5215	6.6605	0.12888	4.3	5	5.8	6.7	7.5	8.5	9.5
1-5 mo	0.5902	5.075	0.13444	3.2	3.8	4.4	5.1	5.8	6.5	7.3
2-6 mo	0.6469	4.0154	0.14318	2.4	2.9	3.5	4	4.6	5.2	5.9
3-7 mo	0.6952	3.3542	0.15397	1.9	2.4	2.9	3.4	3.9	4.4	5
4-8 mo	0.7374	2.8419	0.16676	1.5	1.9	2.4	2.8	3.3	3.8	4.4
5-9 mo	0.7748	2.3945	0.18192	1.2	1.6	2	2.4	2.8	3.3	3.8
6-10 mo	0.8085	2.0271	0.19915	0.9	1.3	1.6	2	2.4	2.9	3.3
7-11 mo	0.8391	1.7353	0.21812	0.7	1	1.4	1.7	2.1	2.5	2.9
8-12 mo	0.8672	1.5073	0.23888	0.5	0.8	1.2	1.5	1.9	2.2	2.6
9-13 mo	0.8931	1.3296	0.26147	0.3	0.7	1	1.3	1.7	2	2.4
10-14 mo	0.9172	1.1864	0.28575	0.2	0.5	0.9	1.2	1.5	1.9	2.2
11-15 mo	0.9397	1.0642	0.31149	0.1	0.4	0.7	1.1	1.4	1.7	2.1
12-16 mo	0.9608	0.9573	0.33813	0	0.3	0.6	1	1.3	1.6	1.9
13-17 mo	0.9808	0.8664	0.36514	0	0.2	0.6	0.9	1.2	1.5	1.8
14-18 mo	0.9996	0.794	0.39238	0	0.2	0.5	0.8	1.1	1.4	1.7
15-19 mo	1.0175	0.7411	0.41976	0	0.1	0.4	0.7	1.1	1.4	1.7
16-20 mo	1.0344	0.6953	0.44691	0	0.1	0.4	0.7	1	1.3	1.6
17-21 mo	1.0506	0.6457	0.4735	0	0	0.3	0.6	0.9	1.2	1.5
18-22 mo	1.0661	0.5953	0.49958	0	0	0.3	0.6	0.9	1.2	1.5
19-23 mo	1.081	0.5473	0.52538	0	0	0.3	0.5	0.8	1.1	1.4
20-24 mo	1.0952	0.5013	0.55112	0	0	0.2	0.5	0.8	1	1.3