Frequencies for first 10,000 rows of nuclr_mdcn_srvc_cd variable in pos2003 dataset :

       srv: |
    nuclear |
   medicine |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,789       87.89       87.89
          0 |        441        4.41       92.30
          1 |        552        5.52       97.82
          2 |        195        1.95       99.77
          3 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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