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

       srv: |
    nuclear |
   medicine |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        374        3.74       92.25
          1 |        582        5.82       98.07
          2 |        175        1.75       99.82
          3 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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