<prompt> Translate the following text to EnglishKatika kipindi cha mwaka 1993 hadi 1996, huduma ya posta ilifanya uchunguzi huo kwa kutumia kikundi kidogo cha njia 400 hivi.  <response>: Between 1993 and 1996, the Postal Service conducted the survey using a relatively small panel of about 400 routes. 