Frequencies for first 10,000 rows of nebuther variable in nhamcsed2015 dataset 

  Nebulizer |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,710       97.10       97.10
        Yes |        290        2.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017