Frequencies for first 10,000 rows of resint variable in nhamcsopd1992 dataset : Resident/in | tern seen | Freq. Percent Cum. ------------+----------------------------------- 0 | 7,292 72.92 72.92 1 | 2,708 27.08 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016