Frequencies for first 10,000 rows of prov2195 variable in pos1999 dataset :

       srv: |
interns and |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,564       85.64       85.64
          0 |      1,411       14.11       99.75
          1 |          9        0.09       99.84
          2 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016