Frequencies for first 10,000 rows of drg5ing2 variable in nhamcsed1999 dataset : ingredient | code #2 for | drug #5 | Freq. Percent Cum. ------------+----------------------------------- | 9,956 99.56 99.56 50745 | 2 0.02 99.58 51175 | 1 0.01 99.59 51340 | 2 0.02 99.61 52490 | 1 0.01 99.62 52650 | 13 0.13 99.75 52720 | 4 0.04 99.79 53175 | 2 0.02 99.81 53280 | 1 0.01 99.82 53720 | 1 0.01 99.83 53895 | 1 0.01 99.84 54094 | 1 0.01 99.85 54455 | 1 0.01 99.86 54468 | 1 0.01 99.87 54595 | 1 0.01 99.88 54890 | 2 0.02 99.90 55115 | 2 0.02 99.92 55997 | 5 0.05 99.97 56020 | 1 0.01 99.98 56193 | 1 0.01 99.99 57033 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016