<prompt> Translate the following text to EnglishMfumo wa Msaada wa Mji una sampuli ya njia 8,300 na Mfumo wa Hesabu ya Barua ya Taifa ya Vijijini ya 1999 hutoa data juu ya njia 39,737 za vijijini.  <response>: The City Carrier System contains a stratified sample of 8,300 routes and the 1999 Rural National Mail Count System provides data on 39,737 rural routes. 