Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsopd1992 dataset : Ingredient | code #3 for | medication | #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,936 99.36 99.36 50637 | 2 0.02 99.38 50745 | 2 0.02 99.40 51443 | 1 0.01 99.41 53175 | 5 0.05 99.46 54050 | 1 0.01 99.47 54465 | 21 0.21 99.68 54595 | 6 0.06 99.74 54995 | 4 0.04 99.78 55080 | 1 0.01 99.79 55130 | 9 0.09 99.88 55240 | 6 0.06 99.94 55745 | 1 0.01 99.95 56020 | 2 0.02 99.97 56193 | 1 0.01 99.98 56345 | 1 0.01 99.99 57028 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016