<prompt> Translate the following text to EnglishUhamiaji wa watu kutoka Bulgaria hadi Ulaya Magharibi umekuwa mkubwa: Watu 500,000 wameondoka Bulgaria kiwango cha jumla cha watu milioni 9 tangu 1989.  <response>: Emigration to Western Europe has been significant : Five hundred thousand people have left Bulgaria total population, 9 million since 1989. 