Frequencies for first 10,000 rows of nuclr_mdcn_srvc_cd variable in pos1994 dataset :

       srv: |
    nuclear |
   medicine |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |        347        3.47       92.87
          1 |        534        5.34       98.21
          2 |        161        1.61       99.82
          3 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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