Frequencies for first 10,000 rows of drg1ing3 variable in nhamcsed1997 dataset : ingredient | code #3 for | drug #1 | Freq. Percent Cum. ------------+----------------------------------- | 9,875 98.75 98.75 50637 | 2 0.02 98.77 50745 | 8 0.08 98.85 51443 | 1 0.01 98.86 52908 | 5 0.05 98.91 52990 | 1 0.01 98.92 53175 | 18 0.18 99.10 53895 | 1 0.01 99.11 54330 | 1 0.01 99.12 54350 | 1 0.01 99.13 54395 | 17 0.17 99.30 54455 | 1 0.01 99.31 54465 | 8 0.08 99.39 54595 | 22 0.22 99.61 54960 | 2 0.02 99.63 54995 | 4 0.04 99.67 55105 | 9 0.09 99.76 55108 | 1 0.01 99.77 55240 | 23 0.23 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016