This document shows mortality data from birth to age 15 for an unspecified population. It includes the number of individuals dying and surviving within each age interval, as well as the fraction of survivors in each interval compared to the original number of newborns. The data indicates high mortality in the first year of life and gradually declining survivorship with increasing age.

3. Age Interval Number Dying Number Surviving Number Surviving
(Years) During Age At Beginning of As a Fraction of
Interval Age Interval of Newborn
x d(x) n(x) l(x)
0-1 121 608 1.000
1-2 7 487 l(1)=487/608 0.801
2-3 8 480 0.789
3-4 7 472 0.776
4-5 18 465 0.764
5-6 28 447 0.734
6-7 29 419 0.688
7-8 42 390 l(7)=390/608 0.640
8-9 80 348 0.571
9-10 114 268 0.439
10-11 95 154 0.262
11-12 55 59 0.096
12-13 2 4 0.006
13-14 2 2 0.003
14-15 0 0 0.000
Taken from Ricklefs (1979). Based on data from Murie (1944)