Frequencies for first 10,000 rows of prov2370 variable in pos2001 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,865       68.65       68.65
          0 |        251        2.51       71.16
          1 |      1,194       11.94       83.10
          2 |      1,275       12.75       95.85
          3 |        415        4.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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