How to read I485 inventory

In the I-485 inventory released in July 2018 , for India inventory

  1. Why there are no values after Apr-2009 in the EB3 India and
  2. How does the report know the pending cases? EB2 - India has values for the whole year 2009 when the priority date for EB2 is still running for year 2009. How do they come to know of the coming months that these many have applied for I-485 in that month.

Hi @igob

This report has been created by USCIS and was shared in July 2018.

They have all the data that they have shared.
If there is no data for any category, then it means that ot has never been current.