Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd1996 dataset : ingredient | code #3 for | medication | #4 | Freq. Percent Cum. ------------+----------------------------------- | 9,970 99.70 99.70 50637 | 1 0.01 99.71 50745 | 2 0.02 99.73 53175 | 1 0.01 99.74 53915 | 1 0.01 99.75 54325 | 1 0.01 99.76 54455 | 2 0.02 99.78 54465 | 4 0.04 99.82 54595 | 3 0.03 99.85 54755 | 1 0.01 99.86 54995 | 1 0.01 99.87 55105 | 4 0.04 99.91 55130 | 3 0.03 99.94 55240 | 2 0.02 99.96 55360 | 1 0.01 99.97 55715 | 1 0.01 99.98 55745 | 1 0.01 99.99 56193 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016