Frequencies for first 10,000 rows of drug3cl2 variable in namcs2004 dataset : ndc code #2 | for | medication | #3 | Freq. Percent Cum. ------------+----------------------------------- | 9,789 97.89 97.89 0506 | 1 0.01 97.90 0507 | 14 0.14 98.04 0510 | 4 0.04 98.08 0512 | 21 0.21 98.29 0513 | 13 0.13 98.42 0875 | 1 0.01 98.43 0876 | 1 0.01 98.44 0877 | 1 0.01 98.45 0913 | 1 0.01 98.46 0916 | 1 0.01 98.47 1040 | 2 0.02 98.49 1180 | 4 0.04 98.53 1265 | 6 0.06 98.59 1270 | 1 0.01 98.60 1271 | 1 0.01 98.61 1275 | 5 0.05 98.66 1373 | 7 0.07 98.73 1480 | 1 0.01 98.74 1569 | 5 0.05 98.79 1671 | 6 0.06 98.85 1721 | 3 0.03 98.88 1722 | 1 0.01 98.89 1723 | 1 0.01 98.90 1724 | 52 0.52 99.42 1727 | 24 0.24 99.66 1728 | 16 0.16 99.82 1860 | 2 0.02 99.84 1941 | 1 0.01 99.85 1943 | 6 0.06 99.91 1944 | 3 0.03 99.94 1945 | 1 0.01 99.95 1947 | 5 0.05 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016