Frequencies for first 10,000 rows of asthmaed variable in nhamcsopd2006 dataset :

     asthma |
  education |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,869       98.69       98.69
        Yes |        131        1.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016