Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsed1994 dataset : ingredient | code #3 for | drug #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,879 98.79 98.79 50745 | 2 0.02 98.81 52955 | 1 0.01 98.82 53175 | 5 0.05 98.87 54330 | 1 0.01 98.88 54395 | 27 0.27 99.15 54455 | 2 0.02 99.17 54465 | 23 0.23 99.40 54595 | 15 0.15 99.55 54960 | 3 0.03 99.58 54990 | 5 0.05 99.63 54995 | 7 0.07 99.70 55150 | 1 0.01 99.71 55165 | 1 0.01 99.72 55240 | 25 0.25 99.97 55280 | 1 0.01 99.98 55755 | 1 0.01 99.99 56193 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016