Frequencies for first 10,000 rows of drg4ing1 variable in nhamcsopd1992 dataset : Ingredient | code #1 for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,916 99.16 99.16 50005 | 15 0.15 99.31 50145 | 6 0.06 99.37 50230 | 1 0.01 99.38 50260 | 1 0.01 99.39 50410 | 2 0.02 99.41 50690 | 2 0.02 99.43 50770 | 1 0.01 99.44 50869 | 1 0.01 99.45 50900 | 3 0.03 99.48 51100 | 1 0.01 99.49 51130 | 1 0.01 99.50 51340 | 1 0.01 99.51 51670 | 3 0.03 99.54 51903 | 2 0.02 99.56 51935 | 1 0.01 99.57 52035 | 1 0.01 99.58 52065 | 2 0.02 99.60 52490 | 1 0.01 99.61 52645 | 9 0.09 99.70 53255 | 6 0.06 99.76 53335 | 1 0.01 99.77 53780 | 10 0.10 99.87 54655 | 1 0.01 99.88 54770 | 4 0.04 99.92 54960 | 1 0.01 99.93 55555 | 7 0.07 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016