Frequencies for first 10,000 rows of drg5ing3 variable in nhamcsopd2001 dataset : ingredient | code #3 for | medication | #5 | Freq. Percent Cum. ------------+----------------------------------- | 9,990 99.90 99.90 50745 | 1 0.01 99.91 54465 | 1 0.01 99.92 55105 | 1 0.01 99.93 55145 | 1 0.01 99.94 55755 | 1 0.01 99.95 56185 | 1 0.01 99.96 59803 | 3 0.03 99.99 70325 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016