Frequencies for first 10,000 rows of rdlgy_srvc_cd variable in pos2002 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,212       92.12       92.12
          1 |        148        1.48       93.60
          2 |        625        6.25       99.85
          3 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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