The pic is taken after the starvation period.. it looks like it goes on a ramp=up back, but from 700 to 0 and then some - food period came when Montos was giving +18.. The thing is that this prosperity/population factor is easily going over the small amounts that you get from the villages. It looks like with no control. However I will keep an eye on the bonus of food in market as this is the first time I hear about it, thanks.