Frequencies for first 10,000 rows of athero variable in namcs1996 dataset : does | patient | have - | atheroscler | osis | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,324 93.24 93.24 1 | 676 6.76 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016