Frequencies for first 10,000 rows of llbrflg variable in natl1975 dataset : Date of | Last Live | Birth (by | State) flag | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,706 97.06 97.06 1 | 294 2.94 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 3 Jan 2016