Frequencies for first 10,000 rows of diabetes variable in nhamcsopd1995 dataset : does | patient | have - | diabetes | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,277 92.77 92.77 1 | 723 7.23 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016