<prompt> Translate the following text to SwahiliIts annual growth rate dropped from positive 9.9 percent in 1987-90 to negative 1.6 percent in 1990-93 and further to negative  <response>: Kiwango cha ukuaji wa kila mwaka kilipungua kutoka asilimia 9.9 ya mwaka 1987 hadi mwaka 1993 hadi asilimia 1.6 ya mwaka 1993 na kisha hadi asilimia 0. 