Frequencies for first 10,000 rows of drg1ing4 variable in namcs1993 dataset : ingredient | code #4 for | medication | #1 | Freq. Percent Cum. ------------+----------------------------------- | 9,938 99.38 99.38 51340 | 4 0.04 99.42 53620 | 1 0.01 99.43 53640 | 1 0.01 99.44 54238 | 1 0.01 99.45 54455 | 1 0.01 99.46 54465 | 4 0.04 99.50 54468 | 8 0.08 99.58 54595 | 5 0.05 99.63 54710 | 1 0.01 99.64 54713 | 8 0.08 99.72 54995 | 4 0.04 99.76 55105 | 1 0.01 99.77 55150 | 1 0.01 99.78 55180 | 12 0.12 99.90 55770 | 1 0.01 99.91 56161 | 3 0.03 99.94 56194 | 4 0.04 99.98 56265 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016