Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1999 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,902 99.02 99.02 50745 | 1 0.01 99.03 53175 | 8 0.08 99.11 53180 | 1 0.01 99.12 53325 | 1 0.01 99.13 53895 | 2 0.02 99.15 54228 | 1 0.01 99.16 54328 | 1 0.01 99.17 54395 | 22 0.22 99.39 54455 | 1 0.01 99.40 54465 | 19 0.19 99.59 54595 | 15 0.15 99.74 54960 | 3 0.03 99.77 54990 | 1 0.01 99.78 54995 | 3 0.03 99.81 55105 | 4 0.04 99.85 55240 | 11 0.11 99.96 55548 | 1 0.01 99.97 56193 | 1 0.01 99.98 59803 | 1 0.01 99.99 70011 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016