Frequencies for first 10,000 rows of prov2370 variable in pos1998 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,896       68.96       68.96
          0 |        266        2.66       71.62
          1 |      1,120       11.20       82.82
          2 |      1,304       13.04       95.86
          3 |        414        4.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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