Frequencies for first 10,000 rows of dgnstc_rdlgy_srvc_cd variable in pos1997 dataset :

       srv: |
  radiology |
(therapeuti |
         c) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,792       87.92       87.92
          0 |        752        7.52       95.44
          1 |        258        2.58       98.02
          2 |        167        1.67       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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