Frequencies for first 10,000 rows of bdatefl variable in namcs2000 dataset :

  was birth |
       year |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,697       96.97       96.97
          1 |        303        3.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016