Frequencies for first 10,000 rows of drug4cl2 variable in namcs2003 dataset : ndc code #2 | for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,838 98.38 98.38 0507 | 7 0.07 98.45 0508 | 1 0.01 98.46 0510 | 2 0.02 98.48 0512 | 14 0.14 98.62 0513 | 7 0.07 98.69 0874 | 1 0.01 98.70 0875 | 2 0.02 98.72 0913 | 1 0.01 98.73 1265 | 3 0.03 98.76 1268 | 1 0.01 98.77 1270 | 2 0.02 98.79 1373 | 3 0.03 98.82 1480 | 1 0.01 98.83 1567 | 1 0.01 98.84 1569 | 1 0.01 98.85 1671 | 3 0.03 98.88 1722 | 2 0.02 98.90 1723 | 1 0.01 98.91 1724 | 55 0.55 99.46 1727 | 33 0.33 99.79 1728 | 9 0.09 99.88 1860 | 3 0.03 99.91 1941 | 1 0.01 99.92 1943 | 4 0.04 99.96 1944 | 2 0.02 99.98 1947 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016