Frequencies for first 10,000 rows of rdlgy_srvc_cd variable in pos2017 dataset 

  Ancillary |
  Services: |
  Radiology |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      9,561       95.61       95.61
          1 |         99        0.99       96.60
          2 |        309        3.09       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018