<prompt> Translate the following text to SwahiliWith the personal saving rate around zero or negative, economists have questioned the relevance of the NIPA personal saving measure.  <response>: Kwa kuwa kiwango cha akiba ya kibinafsi ni karibu sifuri au hasi, wataalamu wa uchumi wametilia shaka umuhimu wa kipimo cha akiba ya kibinafsi cha NIPA. 