Frequencies for first 10,000 rows of prov2500 variable in pos1994 dataset :

       srv: |
   physical |
therapy/spe |
   ech path |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,666       96.66       96.66
          1 |        145        1.45       98.11
          2 |         59        0.59       98.70
          3 |        128        1.28       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017