Frequencies for first 10,000 rows of dgnstc_rdlgy_srvc_cd variable in pos1992 dataset :

       srv: |
  radiology |
(therapeuti |
         c) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        731        7.31       95.82
          1 |        246        2.46       98.28
          2 |        153        1.53       99.81
          3 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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