Frequencies for first 10,000 rows of f_ld_anesth variable in natlterr2011 dataset : Anesthesia | (ld_anes) R | Freq. Percent Cum. ------------+----------------------------------- 0 | 5,590 55.90 55.90 1 | 4,410 44.10 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015