Frequencies for first 10,000 rows of radiatth variable in h126f dataset :

 THIS VISIT |
 DID P HAVE |
  RADIATION |
    THERAPY |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        348        3.48        3.48
         -8 |         28        0.28        3.76
         -1 |         64        0.64        4.40
          1 |        402        4.02        8.42
          2 |      2,824       28.24       36.66
         95 |      6,334       63.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Feb 2018