Cohort life table for M group chimpanzees during 19 years (1980-1999)
x	Nx*1	dx*2	cx*3	qx*4	lx*5
0	152	53	0	0.34868	1.00000
1	99	24	8	0.25263	0.65132
2	67	9	1	0.13534	0.48678
3	57	7	3	0.12613	0.42090
4	47	1	2	0.02174	0.36781
5	44	3	0	0.06818	0.35981
6-10	178	7	11	0.04058	0.34521
11-15	79	3	9	0.04027	0.32940
16-20	38	1	4	0.02941	0.31614
21-25	20	1	1	0.05128	0.30684
26-30	11	0	2	0	0.29111
*1 The total number of individuals included in the specific age interval, from age x to age x+1
*2 The total number of individuals that died between specific age intervals
*3 The total number of individuals that emigrated from the group between specific age intervals
*4 Annual mortality rate between specific age interval, calculated from the equation dx(Nx-cx/2)
*5 Survival rate between birth and specific age x
Source:
[67] Nishida T., Corp N., Hamaib M., Hasegawa T., Hiraiwa-Hasegawa M., Hosaka K., Hunt K.D., Itoh N., Kawanaka K., Matsumoto-Oda A., Mitani J.C., Nakamura M., Norikoshi K., Sakamaki T.,Turner L., Uehara S., Zamma K. (2003) Demography, female life history, and reproductive profiles among the chimpanzees of Mahale. Am. J. Primatol. 59: 99-121