Frequencies for first 10,000 rows of f_tobaco variable in natl2010 dataset : Tobacco use | (cig_1 | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,983 99.83 99.83 1 | 17 0.17 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015