ei: Education Index
Variable
World3 03 indicators sector
Education Index [Dmnl]
ei = tabhl ( eit , gdppc / ugdp , 0, 7000, 1000)

ei in the updating graph: ( how to read )
In nodes
eit : Education Index LOOKUP
gdppc : GDP per capita
ugdp : GDP pc unit
Out nodes
hwi : Human Welfare Index
tabhl
