<prompt> Translate the following text to SwahiliPopulation is a reasonable proxy for the size of the network and therefore institutional costs are divided by the U.S. population to obtain the additional cost per person.  <response>: Idadi ya watu ni proxy ya busara kwa ukubwa wa mtandao na kwa hiyo gharama za taasisi ni kugawanywa na idadi ya watu wa Marekani kupata gharama ya ziada kwa mtu. 