Frequencies for first 10,000 rows of drugid28 variable in namcs2015 dataset :

Drug ID for |
 medication |
        #28 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,992       99.92       99.92
     d00321 |          1        0.01       99.93
     d00497 |          1        0.01       99.94
     d00746 |          1        0.01       99.95
     d00749 |          1        0.01       99.96
     d01025 |          1        0.01       99.97
     d03826 |          1        0.01       99.98
     d04220 |          1        0.01       99.99
     d06860 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017