Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1996 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,898 98.98 98.98 50637 | 1 0.01 98.99 50745 | 3 0.03 99.02 52650 | 1 0.01 99.03 52908 | 1 0.01 99.04 53175 | 7 0.07 99.11 53530 | 1 0.01 99.12 53915 | 2 0.02 99.14 54330 | 1 0.01 99.15 54395 | 27 0.27 99.42 54455 | 3 0.03 99.45 54465 | 17 0.17 99.62 54595 | 12 0.12 99.74 54960 | 1 0.01 99.75 54990 | 1 0.01 99.76 54995 | 2 0.02 99.78 55105 | 2 0.02 99.80 55240 | 19 0.19 99.99 55745 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016