Frequencies for first 10,000 rows of prov2220 variable in pos1998 dataset :

       srv: |
    medical |
     social |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,149       81.49       81.49
          0 |        278        2.78       84.27
          1 |      1,085       10.85       95.12
          2 |        356        3.56       98.68
          3 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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