Frequencies for first 10,000 rows of nebuther variable in nhamcsed2012 dataset :

  Nebulizer |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,681       96.81       96.81
        Yes |        319        3.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016