Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20161123 dataset : Correspondi | ng Generic | Drug | Effective | Date | Freq. Percent Cum. ------------+----------------------------------- 23dec2015 | 2 0.02 0.02 20apr2016 | 1 0.01 0.03 18may2016 | 4 0.04 0.07 22jun2016 | 1 0.01 0.08 20jul2016 | 3 0.03 0.11 17aug2016 | 2 0.02 0.13 21sep2016 | 5 0.05 0.18 19oct2016 | 9 0.09 0.27 23nov2016 | 816 8.16 8.43 . | 9,157 91.57 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018