ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Age T.surviv.
T.reproducc.
Initial population
2
85-00
3
80-840,50700
4
75-790,68300
5
70-740,83500
6
65-690,90500
7
60-640,96800
8
55-590,93900
9
50-540,97600
10
45-490,9830,0050
11
40-440,9890,0730
12
35-390,9920,20995000
<- Five years later there are 995,000 aged 35-39, compared to the one million aged 30-34 at the initial time, multiplied by the corresponding survival rate of 0.995
13
30-340,9950,3731000000
<- At the initial moment there are one million women aged 30-34
14
25-290,9950,4850
15
20-240,9970,250
16
15-190,9980,0250
17
10-140,99800
18
5-90,99700
19
0-40,96700373000
<- Five years later there are 373,000 of 0-4, the million of 30-34 that there were at the initial moment multiplied by the corresponding reproduction rate of 0.373
20
If there were women of other age groups who reproduced, we would add their daughters.
21
22
Once we have calculated the population five years later, we can calculate the population ten years later in the same way, and the population fifteen years later, etc.
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30
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34
35
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38
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46
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48
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50
51
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60
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63
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69
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73
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77
78
79
80
81
82
83
84
85
86
87
88
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90
91
92
93
94
95
96
97
98
99
100