Frequencies for first 10,000 rows of chmthrpy_srvc_cd variable in pos2008 dataset :

       srv: |
chemotherap |
  y service |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,262       12.62       99.17
          1 |         71        0.71       99.88
          2 |          7        0.07       99.95
          3 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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