Frequencies for first 10,000 rows of intrn_rsdnt_srvc_cd variable in pos2011 dataset :

   Service: |
Interns and |
  Residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,700       87.00       87.00
          0 |      1,278       12.78       99.78
          1 |          7        0.07       99.85
          2 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019