Aanl:
From what I heard from my attorney there seems to be no logical pattern or reason for them to do this. Although I do believe the chance of being interviewed will continue to decline. In the interview, they would ask you whatever has been asked. So do not worry.
What triggers an interview? He personally thinks those guys will have a bigger chance:
defensive asylee
RTD requested many times
the country of prosecution has changed regime
Again, that is just his second-guessing.
Hope this is helpful.