Do you think these are PERM counts? How does DOS have these numbers unless reported by USCIS ? and How does USCIS know these numbers unless people file their 485's?
USCIS has exact number only until May 2010 for EB2-I.
I think these numbers are total number of EB2 green cards approved until May 2018 for all previous years until YTD.
I am trying to find our source of these numbers.