Table 2. Neonatal Mortality Rates Based on Gestational Age Among Spontaneous and Clinician-Initiated Deliveries: US Singleton Live Births, 2006-2013.

Gestational Age, wk	Neonatal Deaths, No. (Rate per 1000 Live Births)
	2006	2007	2008	2009	2010	2011	2012	2013
Spontaneous Delivery
20-27	2099 (387.8)	2943 (381.3)	3464 (391.8)	3406 (385.6)	3770 (377.5)	3938 (367.1)	3926 (362.2)	3901 (360.1)
28-31	197 (32.4)	267 (30.3)	327 (33.3)	309 (31.9)	306 (28.5)	286 (24.4)	253 (20.8)	269 (22.3)
32-33	94 (11.7)	137 (11.8)	138 (10.5)	137 (10.6)	186 (12.9)	162 (10.6)	157 (9.8)	171 (10.7)
34-36	161 (2.7)	260 (3.0)	293 (3.0)	315 (3.3)	358 (3.4)	373 (3.3)	346 (3.0)	352 (3.0)
37-38	190 (0.8)	290 (0.8)	320 (0.7)	307 (0.7)	382 (0.8)	368 (0.7)	406 (0.8)	387 (0.7)
39-40	195 (0.4)	308 (0.4)	357 (0.4)	369 (0.4)	375 (0.4)	440 (0.4)	448 (0.4)	460 (0.4)
41	33 (0.7)	42 (0.5)	51 (0.6)	49 (0.5)	40 (0.4)	58 (0.4)	40 (0.5)	50 (0.4)
42-44	2 (0.5)	10 (1.3)	12 (1.4)	9 (1.2)	16 (2.1)	15 (1.9)	20 (2.6)	9 (1.1)
Total	1425 (1.8)	2076 (1.6)	2369 (1.6)	2357 (1.6)	2554 (1.5)	2586 (1.4)	2470 (1.3)	2521 (1.3)
Clinician-Initiated Delivery
20-27	692 (239.5)	1061 (239.0)	1116 (223.5)	1122 (214.4)	1272 (220.5)	1556 (244.6)	1621 (234.5)	1698 (241.0)
28-31	186 (36.5)	288 (37.1)	311 (36.0)	340 (38.1)	346 (34.8)	432 (40.4)	422 (38.3)	438 (38.7)
32-33	91 (15.5)	141 (16.0)	184 (18.7)	155 (15.4)	187 (16.6)	194 (15.8)	240 (19.6)	257 (19.9)
34-36	200 (5.1)	299 (5.1)	351 (5.3)	369 (5.6)	354 (5.5)	422 (5.7)	473 (6.2)	486 (6.3)
37-38	239 (1.1)	332 (1.0)	370 (1.0)	362 (1.1)	379 (1.1)	458 (1.4)	432 (1.4)	430 (1.4)
39-40	191 (0.6)	267 (0.5)	329 (0.5)	331 (0.5)	389 (0.5)	447 (0.5)	460 (0.5)	499 (0.5)
41	21 (0.5)	41 (0.6)	47 (0.6)	48 (0.6)	41 (0.5)	57 (0.6)	56 (0.6)	63 (0.6)
42-44	4 (1.0)	9 (1.4)	11 (1.6)	8 (1.3)	13 (2.0)	6 (0.9)	3 (0.5)	13 (1.9)
Total	1367 (2.1)	2013 (2.0)	2287 (2.0)	2283 (2.0)	2490 (1.9)	2905 (2.1)	3005 (2.1)	3196 (2.2)