Frequencies for first 10,000 rows of hivstdtr variable in namcs2000 dataset : hiv/ std | transmissio | n | couns/educ | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,935 99.35 99.35 1 | 65 0.65 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016