Frequencies for first 10,000 rows of bdatefl variable in namcs2013 dataset :

        Was |
   variable |
   imputed: |
 birth year |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      9,983       99.83       99.83
    Imputed |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017