Frequencies for first 10,000 rows of dob_yy variable in natl2015 dataset :

 Birth Year |
  2015 Year |
   of birth |      Freq.     Percent        Cum.
------------+-----------------------------------
       2015 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016