Frequencies for ce_hcc7 variable in hcccoefn dataset :

 metastatic |
 cancer and |
      acute |
   leukemia |      Freq.     Percent        Cum.
------------+-----------------------------------
      2.175 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 2 May 2016