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. 2008 May 5;105(20):7124–7128. doi: 10.1073/pnas.0710234105

Fig. 1.

Fig. 1.

Per capita production and consumption by age (weighted average for three Amazon Basin hunter–gatherer groups, sexes combined) Modified from Kaplan (20) as in Lee (19). Note the long duration of juvenile dependence and the continuing production of surplus in old age.