Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1998 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,917 99.17 99.17 50637 | 1 0.01 99.18 50745 | 2 0.02 99.20 51223 | 1 0.01 99.21 52035 | 1 0.01 99.22 52650 | 1 0.01 99.23 52908 | 1 0.01 99.24 53175 | 5 0.05 99.29 54050 | 1 0.01 99.30 54330 | 1 0.01 99.31 54395 | 17 0.17 99.48 54455 | 1 0.01 99.49 54465 | 12 0.12 99.61 54480 | 1 0.01 99.62 54595 | 8 0.08 99.70 54960 | 3 0.03 99.73 54995 | 6 0.06 99.79 55105 | 2 0.02 99.81 55240 | 14 0.14 99.95 56195 | 1 0.01 99.96 56345 | 1 0.01 99.97 57166 | 1 0.01 99.98 59803 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016