Frequencies for first 10,000 rows of drug4cl2 variable in namcs2002 dataset : NDC code #2 | for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,875 98.75 98.75 0507 | 2 0.02 98.77 0510 | 3 0.03 98.80 0512 | 11 0.11 98.91 0513 | 9 0.09 99.00 0875 | 1 0.01 99.01 1034 | 4 0.04 99.05 1265 | 5 0.05 99.10 1270 | 1 0.01 99.11 1275 | 1 0.01 99.12 1373 | 6 0.06 99.18 1671 | 2 0.02 99.20 1722 | 2 0.02 99.22 1723 | 1 0.01 99.23 1724 | 56 0.56 99.79 1727 | 5 0.05 99.84 1728 | 3 0.03 99.87 1860 | 1 0.01 99.88 1941 | 1 0.01 99.89 1943 | 3 0.03 99.92 1944 | 2 0.02 99.94 1947 | 6 0.06 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016