Frequencies for first 10,000 rows of pelvic variable in nhamcsopd1995 dataset : pelvic exam | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,208 92.08 92.08 1 | 792 7.92 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016