Frequencies for first 10,000 rows of prov2500 variable in pos1995 dataset :

       srv: |
   physical |
therapy/spe |
   ech path |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,630       96.30       96.30
          1 |        161        1.61       97.91
          2 |         63        0.63       98.54
          3 |        144        1.44       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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