Frequencies for first 10,000 rows of weight variable in namcs1996 dataset : weight | reduction | couns/educ | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,461 94.61 94.61 1 | 539 5.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016