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

      RACER |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      8,186       81.86       81.86
    Imputed |      1,814       18.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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