Frequencies for first 10,000 rows of rdlgy_srvc_cd variable in pos2008 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,650       96.50       96.50
          1 |         72        0.72       97.22
          2 |        257        2.57       99.79
          3 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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