Frequencies for first 10,000 rows of rdlgy_srvc_cd variable in pos2000 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,327       93.27       93.27
          1 |        141        1.41       94.68
          2 |        523        5.23       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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