Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1993 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,886 98.86 98.86 50637 | 1 0.01 98.87 50745 | 2 0.02 98.89 51670 | 1 0.01 98.90 53175 | 11 0.11 99.01 53530 | 1 0.01 99.02 53720 | 1 0.01 99.03 53895 | 2 0.02 99.05 53915 | 1 0.01 99.06 54395 | 35 0.35 99.41 54465 | 15 0.15 99.56 54595 | 11 0.11 99.67 54960 | 2 0.02 99.69 54990 | 1 0.01 99.70 54995 | 8 0.08 99.78 55240 | 20 0.20 99.98 55280 | 1 0.01 99.99 57034 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016