Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1997 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,908 99.08 99.08 50745 | 4 0.04 99.12 51443 | 1 0.01 99.13 52885 | 1 0.01 99.14 52908 | 2 0.02 99.16 53175 | 15 0.15 99.31 53895 | 1 0.01 99.32 53965 | 1 0.01 99.33 54050 | 1 0.01 99.34 54395 | 17 0.17 99.51 54465 | 12 0.12 99.63 54480 | 1 0.01 99.64 54595 | 8 0.08 99.72 54713 | 1 0.01 99.73 54995 | 1 0.01 99.74 55105 | 1 0.01 99.75 55108 | 1 0.01 99.76 55240 | 23 0.23 99.99 55745 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016