Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20160831 dataset : Correspondi | ng Generic | Drug | Effective | Date | Freq. Percent Cum. ------------+----------------------------------- 18nov2015 | 1 0.01 0.01 23dec2015 | 2 0.02 0.03 20apr2016 | 1 0.01 0.04 18may2016 | 14 0.14 0.18 22jun2016 | 5 0.05 0.23 20jul2016 | 11 0.11 0.34 17aug2016 | 805 8.05 8.39 24aug2016 | 6 0.06 8.45 . | 9,155 91.55 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018