<prompt> Translate the following text to EnglishKwa kweli, mstari wa matukio makuu katika kuwepo kwa GAO tazama picha 4 unafunua maendeleo ya kuongezeka, utata na ushawishi wa masuala magumu ya sera ya umma yanayohusiana na shughuli za serikali na uwajibikaji wetu.  <response>: In fact, the timeline of major events in GAOs existence see figure 4 reveals the increasing development, complexity and influence of difficult public policy issues related to government activity and our accountability 