Frequencies for first 10,000 rows of drugid25 variable in nhamcsed2015 dataset 

    Drug ID |
   code for |
 medication |
        #25 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,986       99.86       99.86
     a10638 |          1        0.01       99.87
     d00049 |          1        0.01       99.88
     d00059 |          1        0.01       99.89
     d00070 |          1        0.01       99.90
     d00173 |          1        0.01       99.91
     d00328 |          1        0.01       99.92
     d00438 |          1        0.01       99.93
     d00440 |          1        0.01       99.94
     d00558 |          1        0.01       99.95
     d00787 |          1        0.01       99.96
     d03393 |          1        0.01       99.97
     d03428 |          1        0.01       99.98
     d03826 |          1        0.01       99.99
     d04276 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017