<prompt> Translate the following text to EnglishVipengele vya data kutumika katika utafiti huu idadi ya anwani kutumika; idadi ya vituo; kwa ajili ya waendeshaji mji tu kiasi kwa anwani, na anwani kwa kilomita kwa ajili ya waendeshaji vijijini tu.  <response>: The data elements used in this study the number of addresses served; the number of stops; for city carriers only volume per address, and address per kilometer for rural carriers only. 