Frequencies for first 10,000 rows of drg2ing4 variable in namcs2002 dataset : Ingredient | code #4 for | medication | #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,976 99.76 99.76 54440 | 1 0.01 99.77 54713 | 1 0.01 99.78 55520 | 1 0.01 99.79 55755 | 5 0.05 99.84 56020 | 1 0.01 99.85 56193 | 2 0.02 99.87 70260 | 7 0.07 99.94 70338 | 2 0.02 99.96 70344 | 1 0.01 99.97 70440 | 1 0.01 99.98 70668 | 1 0.01 99.99 70673 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016