<prompt> Translate the following text to EnglishKatika mwaka wa fedha wa 1999, GAO ilitoa michango mikubwa kusaidia Bunge na mashirika ya tawi la utekelezaji kuboresha programu na huduma za serikali.  <response>: During fiscal year 1999, GAO made substantial contributions to help the Congress and the executive branch agencies improve government programs and services. 