<prompt> Translate the following text to EnglishKufikia mwishoni mwa miaka ya 1980, biashara na misaada ya Sovieti ilikuwa sababu muhimu katika kuimarisha uchumi wa Cuba uliokuwa umezungukwa sana na mara nyingi uliopangwa vibaya.  <response>: Until the end of the 1980s, Soviet trade and subsidies were crucial factors in propping up Cubas heavily centralized and often badly planned economy. 