Interval	L	M	S	-3 SD	-2 SD	-1 SD	Median	1 SD	2 SD	3 SD
0-6 mo	0.2608	8.2683	0.11607	5.7	6.5	7.3	8.3	9.3	10.4	11.5
1-7 mo	0.3426	6.5037	0.11997	4.4	5.1	5.8	6.5	7.3	8.2	9.1
2-8 mo	0.414	5.2206	0.1259	3.5	4	4.6	5.2	5.9	6.6	7.4
3-9 mo	0.4774	4.341	0.13381	2.8	3.3	3.8	4.3	4.9	5.6	6.3
4-10 mo	0.5344	3.6748	0.14324	2.3	2.7	3.2	3.7	4.2	4.8	5.4
5-11 mo	0.5863	3.1336	0.15447	1.8	2.2	2.7	3.1	3.6	4.2	4.7
6-12 mo	0.6338	2.689	0.16777	1.5	1.8	2.3	2.7	3.2	3.6	4.2
7-13 mo	0.6777	2.3226	0.18258	1.2	1.5	1.9	2.3	2.8	3.2	3.7
8-14 mo	0.7186	2.0288	0.19851	0.9	1.3	1.6	2	2.4	2.9	3.3
9-15 mo	0.7567	1.7978	0.21524	0.7	1.1	1.4	1.8	2.2	2.6	3
10-16 mo	0.7925	1.6098	0.23248	0.6	0.9	1.2	1.6	2	2.4	2.8
11-17 mo	0.8262	1.45	0.24989	0.5	0.8	1.1	1.5	1.8	2.2	2.6
12-18 mo	0.8581	1.3166	0.26722	0.3	0.6	1	1.3	1.7	2	2.4
13-19 mo	0.8884	1.2111	0.28419	0.2	0.5	0.9	1.2	1.6	1.9	2.3
14-20 mo	0.9172	1.1249	0.30032	0.2	0.5	0.8	1.1	1.5	1.8	2.2
15-21 mo	0.9446	1.0506	0.31516	0.1	0.4	0.7	1.1	1.4	1.7	2.1
16-22 mo	0.9708	0.9819	0.32846	0	0.3	0.7	1	1.3	1.6	2
17-23 mo	0.9959	0.9149	0.34024	0	0.3	0.6	0.9	1.2	1.5	1.9
18-24 mo	1.02	0.8494	0.35116	0	0.2	0.5	0.8	1.1	1.4	1.7