Frequencies for first 10,000 rows of birattnd variable in natl1989 dataset : Attendant | at birth | Freq. Percent Cum. ------------+----------------------------------- 1 | 9,654 96.54 96.54 2 | 100 1.00 97.54 3 | 201 2.01 99.55 5 | 41 0.41 99.96 9 | 4 0.04 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 3 Jan 2016