 
<translate> Dalili: Hukuncin da ya dace a cikin nassi shine: Babu takamaiman kwanakin lokacin da wannan rukunin ya fara ko ya ƙare; masu ilimin alƙaluma da masu bincike yawanci suna amfani da farkon shekarun 1980 a matsayin farkon shekarun haihuwa da tsakiyar shekarun 1990 zuwa farkon 2000s a matsayin ƙarshen shekarun haihuwa. <eng> Reasoning: The relevant sentence in the passage is: There are no precise dates for when this cohort starts or ends; demographers and researchers typically use the early 1980s as starting birth years and the mid-1990s to early 2000s as ending birth years. 