Frequencies for first 10,000 rows of prov2500 variable in pos1997 dataset :

       srv: |
   physical |
therapy/spe |
   ech path |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,492       94.92       94.92
          1 |        251        2.51       97.43
          2 |         69        0.69       98.12
          3 |        185        1.85       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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