Frequencies for first 10,000 rows of drugid21 variable in nhamcsed2014 dataset :

    Drug ID |
   code for |
 medication |
        #21 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
     c00110 |          1        0.01       99.82
     d00022 |          1        0.01       99.83
     d00180 |          1        0.01       99.84
     d00212 |          1        0.01       99.85
     d00252 |          1        0.01       99.86
     d00255 |          1        0.01       99.87
     d00278 |          1        0.01       99.88
     d00308 |          1        0.01       99.89
     d00350 |          1        0.01       99.90
     d00405 |          1        0.01       99.91
     d00438 |          2        0.02       99.93
     d00728 |          1        0.01       99.94
     d01013 |          1        0.01       99.95
     d01120 |          1        0.01       99.96
     d03180 |          1        0.01       99.97
     d03766 |          1        0.01       99.98
     d04066 |          1        0.01       99.99
     d04611 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017