<prompt> Translate the following text to Swahili, every one percent increase in the number of households has yielded exactly a one percent increase in all annual mail volumes and for all years in Tables 1, 2, and 3, we can, then, divide the annual volume figures by the number of households in the respective year to obtain annual volume figures per household.  <response>: Kwa kila ongezeko la asilimia moja katika idadi ya kaya, ongezeko la asilimia moja katika kiasi cha barua kwa mwaka limetokana na idadi ya nyumba kwa mwaka. 