Frequencies for first 10,000 rows of tbtest variable in namcs2014 dataset : Tuberculosi | s skin | testing | Freq. Percent Cum. ------------+----------------------------------- No | 9,954 99.54 99.54 Yes | 46 0.46 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 27 Mar 2017