p4: Population 65 Plus
Variable
Population sector
Population 65 Plus [Person]
p4 = p4 + dt*( mat3 - d4 )

p4 in the updating graph: ( how to read )
In nodes
mat3 : maturation 64 to 65
p4i : initial population 65 plus
d4 : deaths 65 plus
p4 : Population 65 Plus
Out nodes
pop : population
d4 : deaths 65 plus
p4 : Population 65 Plus