Frequencies for first 10,000 rows of drg1ing4 variable in namcs1999 dataset : ingredient | code #4 for | medication | #1 | Freq. Percent Cum. ------------+----------------------------------- | 9,956 99.56 99.56 53640 | 4 0.04 99.60 54440 | 3 0.03 99.63 54468 | 2 0.02 99.65 54595 | 1 0.01 99.66 54713 | 2 0.02 99.68 54995 | 1 0.01 99.69 55105 | 1 0.01 99.70 55180 | 2 0.02 99.72 55270 | 1 0.01 99.73 55645 | 1 0.01 99.74 55710 | 2 0.02 99.76 55755 | 20 0.20 99.96 55770 | 1 0.01 99.97 56185 | 1 0.01 99.98 56194 | 1 0.01 99.99 57170 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016