Frequencies for first 10,000 rows of prov2195 variable in pos1995 dataset :

       srv: |
interns and |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,740       87.40       87.40
          0 |      1,242       12.42       99.82
          1 |          8        0.08       99.90
          2 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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