Frequencies for first 10,000 rows of pf_filing_req_cd variable in eobmfus dataset :

      PF Filiing |
Requirement Code |
           (New) |      Freq.     Percent        Cum.
-----------------+-----------------------------------
No 990-PF return |      9,440       94.40       94.40
   990-PF return |        550        5.50       99.90
               3 |         10        0.10      100.00
-----------------+-----------------------------------
           Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Apr 2019