Frequencies for first 10,000 rows of f_wtgain variable in natlterr2011 dataset : Weight gain | (wtgain | Freq. Percent Cum. ------------+----------------------------------- 0 | 1,261 12.61 12.61 1 | 8,739 87.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015