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

       srv: |
    nuclear |
   medicine |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        381        3.81       92.52
          1 |        548        5.48       98.00
          2 |        179        1.79       99.79
          3 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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