Frequencies for first 10,000 rows of drug4cl2 variable in namcs2005 dataset : ndc code #2 | for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,742 97.42 97.42 0120 | 1 0.01 97.43 0503 | 1 0.01 97.44 0504 | 1 0.01 97.45 0507 | 14 0.14 97.59 0510 | 9 0.09 97.68 0512 | 25 0.25 97.93 0513 | 7 0.07 98.00 0875 | 1 0.01 98.01 0876 | 1 0.01 98.02 0913 | 7 0.07 98.09 0916 | 2 0.02 98.11 1034 | 2 0.02 98.13 1036 | 2 0.02 98.15 1180 | 2 0.02 98.17 1265 | 2 0.02 98.19 1275 | 1 0.01 98.20 1373 | 6 0.06 98.26 1568 | 2 0.02 98.28 1671 | 7 0.07 98.35 1721 | 1 0.01 98.36 1722 | 3 0.03 98.39 1724 | 82 0.82 99.21 1727 | 37 0.37 99.58 1728 | 17 0.17 99.75 1860 | 2 0.02 99.77 1940 | 1 0.01 99.78 1943 | 8 0.08 99.86 1944 | 7 0.07 99.93 1947 | 6 0.06 99.99 2100 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016