Frequencies for ce_hcc77 variable in hcccoefn dataset :

 respirator |
dependence/ |
   tracheos |      Freq.     Percent        Cum.
------------+-----------------------------------
      1.867 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

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