<prompt> Translate the following text to EnglishKiwango cha wastani cha ukuaji wa uchumi wa nchi hiyo kilipungua kutoka asilimia 8.0 mwaka 1987 hadi 1990 hadi asilimia 0.3 mwaka 1990 hadi 1993 na hadi asilimia -1.3 mwaka 1993 hadi 1997.  <response>: Its average annual growth rate dropped from 8.0 percent in 1987-90 to 0.3 percent in 1990-93 and further to negative 1.3 percent in 1993-97. 