"Since the beginning of the program in 1936 and through Tax Year (TY) 2003, the most recent year for which data is available, the suspense file contained about 255 million W-2s."
Nothing is removed from that file unless it can be transferred to a valid SS account. And once there's "immigration reform" the illegal workers can have their data move to the shiny new SS accounts.
ILLEGAL immigration exploded under the Clintons
This shows the accumulation of some 255 million no-matches in the Social Security Earnings Suspense File (ESF). These are the no-matched W-2, suspended wage data in the Earnings Suspense File (ESF); it exploded under Clinton. Employers submitted annual wage data to SS and this shows invalid SSN's in those W-2 forms.
It's from a report to Congress (as of 2003, Here).
I tested the link it no longer links to a pdf file with the graphic but the wording seems to be unaffected.