Frequencies for first 10,000 rows of prov2220 variable in pos2001 dataset :

       srv: |
    medical |
     social |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,124       81.24       81.24
          0 |        286        2.86       84.10
          1 |      1,096       10.96       95.06
          2 |        361        3.61       98.67
          3 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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