Frequencies for first 10,000 rows of drg2ing4 variable in namcs2005 dataset : ingredient | code #4 for | medication | #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,947 99.47 99.47 53175 | 2 0.02 99.49 54165 | 1 0.01 99.50 54330 | 1 0.01 99.51 54713 | 1 0.01 99.52 55105 | 1 0.01 99.53 55755 | 9 0.09 99.62 56193 | 1 0.01 99.63 56194 | 4 0.04 99.67 57210 | 1 0.01 99.68 70154 | 1 0.01 99.69 70260 | 7 0.07 99.76 70334 | 3 0.03 99.79 70336 | 4 0.04 99.83 70338 | 4 0.04 99.87 70344 | 1 0.01 99.88 70358 | 1 0.01 99.89 70362 | 1 0.01 99.90 70365 | 1 0.01 99.91 70440 | 2 0.02 99.93 70572 | 1 0.01 99.94 70668 | 2 0.02 99.96 70708 | 4 0.04 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016