Frequencies for first 10,000 rows of dgnstc_rdlgy_srvc_cd variable in pos1994 dataset :

       srv: |
  radiology |
(therapeuti |
         c) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |        681        6.81       96.21
          1 |        211        2.11       98.32
          2 |        147        1.47       99.79
          3 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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