Frequencies for first 10,000 rows of pelvic variable in namcs2000 dataset : pelvic exam | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,492 94.92 94.92 1 | 508 5.08 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016