Frequencies for first 10,000 rows of drg6ing3 variable in nhamcsopd2000 dataset : ingredient | code #3 for | medication | #6 | Freq. Percent Cum. ------------+----------------------------------- | 9,989 99.89 99.89 50637 | 1 0.01 99.90 50745 | 2 0.02 99.92 54395 | 2 0.02 99.94 54455 | 1 0.01 99.95 54960 | 1 0.01 99.96 55105 | 1 0.01 99.97 55240 | 1 0.01 99.98 55755 | 1 0.01 99.99 70020 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016