Hopefully they know more about this than me
http://www.cullenanddykman.com/news-advisories-145.htmlTo assist institutions in determining whether either exemption applies to them in 2017, the DFS published, based on available data, the “Total Number of Residential Real Property Mortgages Originated in the State During the Calendar Year Ending Two Years Prior to the Current Calendar Year,†that is, in 2015. That “Total Numberâ€â€”i.e., the denominator in the above equation—is 212,646. Each institution’s numerator would be equivalent to the number of mortgages issued in the New York State during 2015 that the mortgagee originated, owned, serviced and/or maintained.