<prompt> Translate the following text to SwahiliFrom 1987 to 1994 share of USPS mail revenues from US household fell From a little less than 20 percent to a little more than 10 percent  <response>: Tangu mwaka wa 1987 hadi 1994, sehemu ya mapato ya posta ya USP kutoka kwa kaya za Marekani ilipungua kutoka chini ya asilimia 20 hadi zaidi ya asilimia 10. 