<prompt> Translate the following text to EnglishKiwango 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.  <response>: Its annual growth rate dropped from positive 9.9 percent in 1987-90 to negative 1.6 percent in 1990-93 and further to negative 