Frequencies for first 10,000 rows of intrn_rsdnt_srvc_cd variable in pos2000 dataset :

       srv: |
interns and |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,590       85.90       85.90
          0 |      1,382       13.82       99.72
          1 |         10        0.10       99.82
          2 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017