Frequencies for first 10,000 rows of drug7cl2 variable in namcs2005 dataset : ndc code #2 | for | medication | #7 | Freq. Percent Cum. ------------+----------------------------------- | 9,912 99.12 99.12 0506 | 1 0.01 99.13 0507 | 2 0.02 99.15 0508 | 1 0.01 99.16 0510 | 2 0.02 99.18 0512 | 8 0.08 99.26 0513 | 7 0.07 99.33 0913 | 5 0.05 99.38 1036 | 1 0.01 99.39 1265 | 1 0.01 99.40 1268 | 1 0.01 99.41 1373 | 2 0.02 99.43 1671 | 3 0.03 99.46 1724 | 30 0.30 99.76 1727 | 14 0.14 99.90 1728 | 4 0.04 99.94 1943 | 3 0.03 99.97 1947 | 2 0.02 99.99 2100 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016