Frequencies for first 10,000 rows of racerfl variable in nhamcsed2013 dataset :

      RACER |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      7,690       76.90       76.90
    Imputed |      2,310       23.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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