Frequencies for first 10,000 rows of nuclr_mdcn_srvc_cd variable in pos2010 dataset :

       SRV: |
    NUCLEAR |
   MEDICINE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,626       86.26       86.26
          0 |        513        5.13       91.39
          1 |        582        5.82       97.21
          2 |        231        2.31       99.52
          3 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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