U.S. Citizenship and Immigration Services (USCIS) has released a report of the agency’s total pending inventory of applications for employment-based green cards (Form I-485, Application to Register Permanent Residence or Adjust Status). USCIS also has posted five other reports by country of chargeability (China, India, Mexico, Philippines, and All Other Chargeability).
The “Pending Employment-Based Form I-485 Report” shows how many pending adjustment of status (green card) applications in each preference classification have priority dates in a given month and year.
Because of historically higher demand for visas from China, India, Mexico, and the Philippines, each of those countries has its own separate report.
The January 2011 report is available here.
For more information, see the USCIS Q&A here.