<prompt> Translate the following text to EnglishKufikia mwishoni mwa miaka ya 1980, zaidi ya asilimia 80 ya biashara ya Cuba ilikuwa na USSR, ambayo pia ilitoa Cuba ruzuku ya msaada wa serikali yenye thamani ya takriban dola bilioni 5 kwa mwaka.  <response>: By the end of the 1980s, more than 80 percent of Cuban trade was with the USSR, which also provided Cuba with a subsidy of state support worth an estimated US5 billion annually. 