Frequencies for first 10,000 rows of prov2370 variable in pos1997 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,924       69.24       69.24
          0 |        274        2.74       71.98
          1 |      1,140       11.40       83.38
          2 |      1,269       12.69       96.07
          3 |        393        3.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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