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

       SRV: |
  PHYSICIAN |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,213       92.13       92.13
          1 |        513        5.13       97.26
          2 |        190        1.90       99.16
          3 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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