Frequencies for first 10,000 rows of telephon variable in namcs2002 dataset : Telephone | follow-up | planned | Freq. Percent Cum. ------------+----------------------------------- No | 9,759 97.59 97.59 Yes | 241 2.41 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016