Frequencies for first 10,000 rows of chmthrpy_srvc_cd variable in pos2016 dataset :

  Services: |
Chemotherap |
     y Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,569       85.69       85.69
          0 |      1,186       11.86       97.55
          1 |        198        1.98       99.53
          2 |         16        0.16       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017