Frequencies for first 10,000 rows of rdlgy_srvc_cd variable in pos2009 dataset :

       SRV: |
  RADIOLOGY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,644       96.44       96.44
          1 |         80        0.80       97.24
          2 |        256        2.56       99.80
          3 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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