Frequencies for first 10,000 rows of renal variable in natl1995 dataset : Renal | disease | Freq. Percent Cum. ------------+----------------------------------- 1 | 5 0.05 0.05 2 | 9,952 99.52 99.57 9 | 43 0.43 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015