<prompt> Translate the following text to SwahiliThe greater variation in volume per address in the U.S. is probably due to the fact that mail volume and income are highly correlated and the fact that the U.S. has a much larger variation in income per household than France.  <response>: Tofauti kubwa katika kiasi kwa kila anwani katika Marekani ni pengine kutokana na ukweli kwamba kiasi cha barua na mapato ni sana kuhusiana na ukweli kwamba Marekani ina tofauti kubwa sana katika mapato kwa kila kaya kuliko Ufaransa. 