Frequencies for first 10,000 rows of dose_amt_mult variable in drug2013q4 dataset : Multiple | DOSE_AMTs | or DOSE_AMT | seems to be | a range | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,999 99.99 99.99 1 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 19 Apr 2017