Frequencies for first 10,000 rows of dob_yy variable in natlterr2014 dataset : Birth Year | 2014 Year | of birth | Freq. Percent Cum. ------------+----------------------------------- 2014 | 10,000 100.00 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 15 Jun 2016