Frequencies for first 10,000 rows of drugid18 variable in nhamcsed2014 dataset :

    Drug ID |
   code for |
 medication |
        #18 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
     a51675 |          1        0.01       99.71
     a52885 |          1        0.01       99.72
     c00110 |          1        0.01       99.73
     d00049 |          1        0.01       99.74
     d00134 |          2        0.02       99.76
     d00216 |          1        0.01       99.77
     d00233 |          1        0.01       99.78
     d00241 |          2        0.02       99.80
     d00252 |          1        0.01       99.81
     d00301 |          1        0.01       99.82
     d00329 |          1        0.01       99.83
     d00438 |          1        0.01       99.84
     d00743 |          1        0.01       99.85
     d00867 |          2        0.02       99.87
     d00910 |          1        0.01       99.88
     d01015 |          1        0.01       99.89
     d01018 |          1        0.01       99.90
     d01456 |          1        0.01       99.91
     d03181 |          1        0.01       99.92
     d03182 |          1        0.01       99.93
     d03428 |          1        0.01       99.94
     d03431 |          1        0.01       99.95
     d03882 |          1        0.01       99.96
     d04066 |          1        0.01       99.97
     d04258 |          1        0.01       99.98
     d04276 |          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