Real time file protection v4

I am using nod32 antivirus v4, and i set exlusion on file extension .dbf.
when i look at protection status>statistic>real-time file system protection i see in scanned object files with extension .dbf, but counter "Number of clean objects" is not increasing.

so my question, are these files with .dbf extension go through scan engine or not? why these filese show up in statistic?

i cant find official information about this, so if anyone know answer on this matter please be kind...

thanks...

 

if you excluded them then they are not scanned