Frequencies for first 10,000 rows of chmthrpy_srvc_cd variable in pos2018 dataset :

  Services: |
Chemotherap |
     y Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,560       85.60       85.60
          0 |      1,180       11.80       97.40
          1 |        209        2.09       99.49
          2 |         15        0.15       99.64
          3 |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019