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

    Lactate |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,856       98.56       98.56
        Yes |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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