p1: Population 0 To 14
Variable
Population sector
Population 0 To 14 [Person]
p1 = p1 + dt*( b - d1 - mat1 )

p1 in the updating graph: ( how to read )
In nodes
b : births
p1i : initial population 0 to 14
d1 : deaths 0 to 14
mat1 : maturation 14 to 15
p1 : Population 0 To 14
Out nodes
pop : population
d1 : deaths 0 to 14
mat1 : maturation 14 to 15
p1 : Population 0 To 14