Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsopd2001 dataset : ingredient | code #3 for | medication | #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,913 99.13 99.13 50745 | 3 0.03 99.16 52980 | 1 0.01 99.17 53640 | 1 0.01 99.18 54328 | 15 0.15 99.33 54330 | 1 0.01 99.34 54455 | 1 0.01 99.35 54465 | 1 0.01 99.36 54595 | 3 0.03 99.39 55105 | 30 0.30 99.69 55130 | 12 0.12 99.81 55160 | 1 0.01 99.82 55240 | 1 0.01 99.83 55480 | 1 0.01 99.84 55755 | 2 0.02 99.86 59629 | 2 0.02 99.88 59803 | 9 0.09 99.97 70259 | 2 0.02 99.99 70335 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016