Frequencies for first 10,000 rows of pt_2_srvc_cd variable in pos2010 dataset :

       SRV: |
   PHYSICAL |
 THERAPY #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,995       99.95       99.95
          2 |          2        0.02       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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