sfsn: Social Family Size Normal
Variable
Population sector
Social Family Size Normal [Dmnl]
sfsn = tabhl ( sfsnt , diopc , 0, 800, 200)

sfsn in the updating graph: ( how to read )
In nodes
diopc : delayed industrial output per capita
sfsnt : social family size normal table
Out nodes
dcfs : desired completed family size
tabhl
