mat1: Maturation 14 To 15
Variable
Population sector
Maturation 14 To 15 [Person/year]
mat1 = p1 *(1 - m1 )/15

mat1 in the updating graph: ( how to read )
In nodes
m1 : mortality 0 to 14
p1 : Population 0 To 14
Out nodes
p2 : Population 15 To 44
p1 : Population 0 To 14