Frequencies for first 10,000 rows of drg4ing1 variable in nhamcsed1994 dataset : ingredient | code #1 for | drug #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,904 99.04 99.04 50000 | 1 0.01 99.05 50005 | 34 0.34 99.39 50090 | 1 0.01 99.40 50145 | 8 0.08 99.48 50260 | 3 0.03 99.51 50325 | 1 0.01 99.52 50420 | 6 0.06 99.58 50585 | 1 0.01 99.59 50806 | 4 0.04 99.63 50899 | 1 0.01 99.64 51130 | 1 0.01 99.65 51219 | 1 0.01 99.66 51340 | 1 0.01 99.67 51670 | 3 0.03 99.70 51675 | 4 0.04 99.74 52065 | 1 0.01 99.75 52490 | 1 0.01 99.76 52615 | 1 0.01 99.77 52645 | 2 0.02 99.79 52655 | 2 0.02 99.81 52885 | 2 0.02 99.83 53003 | 2 0.02 99.85 53780 | 5 0.05 99.90 53895 | 2 0.02 99.92 55555 | 8 0.08 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016