NUMNWPγ=NUMNWPγt−1*(1+NumNwGRγt)
where
NumNwGRγt=NUMNWPGRγt−1*(nwplm−NUMNWPγt−1nwplm−NUMNWPγt−1)2*numnwpgrm
nwplm=numnwplim*POPγ