Frequencies for first 10,000 rows of drg4ing1 variable in nhamcsopd1994 dataset : ingredient | code #1 for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,940 99.40 99.40 50002 | 1 0.01 99.41 50005 | 9 0.09 99.50 50145 | 6 0.06 99.56 50410 | 1 0.01 99.57 50420 | 1 0.01 99.58 50450 | 1 0.01 99.59 50460 | 1 0.01 99.60 50585 | 3 0.03 99.63 50811 | 2 0.02 99.65 51055 | 3 0.03 99.68 51130 | 1 0.01 99.69 51200 | 1 0.01 99.70 51305 | 1 0.01 99.71 51670 | 1 0.01 99.72 51675 | 1 0.01 99.73 51903 | 2 0.02 99.75 52045 | 1 0.01 99.76 52450 | 1 0.01 99.77 52645 | 5 0.05 99.82 52955 | 1 0.01 99.83 53255 | 1 0.01 99.84 53630 | 1 0.01 99.85 53780 | 8 0.08 99.93 55555 | 6 0.06 99.99 55755 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016