Frequencies for first 10,000 rows of drg1ing3 variable in nhamcsed2001 dataset : ingredient | code #3 for | drug #1 | Freq. Percent Cum. ------------+----------------------------------- | 9,885 98.85 98.85 50745 | 9 0.09 98.94 51670 | 1 0.01 98.95 52450 | 1 0.01 98.96 53003 | 1 0.01 98.97 53070 | 2 0.02 98.99 53175 | 15 0.15 99.14 53650 | 1 0.01 99.15 53720 | 1 0.01 99.16 53895 | 1 0.01 99.17 54330 | 1 0.01 99.18 54455 | 3 0.03 99.21 54465 | 1 0.01 99.22 54595 | 10 0.10 99.32 54960 | 1 0.01 99.33 55105 | 19 0.19 99.52 55180 | 5 0.05 99.57 55240 | 9 0.09 99.66 55480 | 5 0.05 99.71 55715 | 11 0.11 99.82 59803 | 3 0.03 99.85 70011 | 11 0.11 99.96 70042 | 1 0.01 99.97 70052 | 1 0.01 99.98 70259 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016