Frequencies for first 10,000 rows of prov2370 variable in pos1999 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,954       69.54       69.54
          0 |        263        2.63       72.17
          1 |      1,087       10.87       83.04
          2 |      1,263       12.63       95.67
          3 |        433        4.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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