Frequencies for first 10,000 rows of prov2500 variable in pos1999 dataset :

       srv: |
   physical |
therapy/spe |
   ech path |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,412       94.12       94.12
          1 |        293        2.93       97.05
          2 |         70        0.70       97.75
          3 |        222        2.22       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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