The USCIS Immigrant Investor Regional Centers page at www.uscis.gov/eb-5centers has been updated with links to documents that list regional center names and tally the I-526 and I-829 approvals for each RC from January 1, 2014 to May 31, 2017.
UPDATE: The logs formerly posted by USCIS have been replaced by a brief message that “USCIS is reviewing inquiries regarding the previously posted Form I-526 and Form I-829 approval and denial statistics by regional center. To provide feedback on that data.