Frequencies for first 10,000 rows of prov2375 variable in pos1995 dataset :

       srv: |
   physical |
 therapy #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,999       99.99       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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