dcfs: Desired Completed Family Size
Variable
Population sector
Desired Completed Family Size [Dmnl]
dcfs = clip ( dcfsn * frsn * sfsn , 2.0, zpgt , time)

dcfs in the updating graph: ( how to read )
In nodes
dcfsn : desired completed family size normal
frsn : family response to social norm
sfsn : social family size normal
zpgt : zero population growth time
Out nodes
dtf : desired total fertility