Frequencies for first 10,000 rows of nuclr_mdcn_srvc_cd variable in pos2007 dataset :

       srv: |
    nuclear |
   medicine |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |        492        4.92       91.74
          1 |        584        5.84       97.58
          2 |        209        2.09       99.67
          3 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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