Frequencies for first 10,000 rows of drg2ing3 variable in nhamcsopd1997 dataset : ingredient | code #3 for | medication | #2 | Freq. Percent Cum. ------------+----------------------------------- | 9,879 98.79 98.79 50637 | 1 0.01 98.80 50745 | 8 0.08 98.88 52450 | 1 0.01 98.89 52490 | 1 0.01 98.90 52908 | 1 0.01 98.91 53175 | 1 0.01 98.92 53895 | 1 0.01 98.93 54325 | 10 0.10 99.03 54328 | 3 0.03 99.06 54330 | 1 0.01 99.07 54395 | 1 0.01 99.08 54455 | 3 0.03 99.11 54465 | 19 0.19 99.30 54595 | 5 0.05 99.35 54995 | 2 0.02 99.37 55105 | 38 0.38 99.75 55130 | 11 0.11 99.86 55240 | 2 0.02 99.88 55315 | 1 0.01 99.89 55745 | 6 0.06 99.95 56185 | 1 0.01 99.96 56193 | 1 0.01 99.97 57058 | 1 0.01 99.98 57122 | 1 0.01 99.99 57166 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016