Frequencies for first 10,000 rows of drugid11 variable in nhamcsed2012 dataset :

    Drug ID |
   code for |
 medication |
        #11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,957       99.57       99.57
     a52885 |          1        0.01       99.58
     a54655 |          2        0.02       99.60
     a55510 |          1        0.01       99.61
     d00021 |          1        0.01       99.62
     d00049 |          1        0.01       99.63
     d00059 |          1        0.01       99.64
     d00125 |          1        0.01       99.65
     d00139 |          1        0.01       99.66
     d00170 |          1        0.01       99.67
     d00184 |          1        0.01       99.68
     d00189 |          1        0.01       99.69
     d00212 |          1        0.01       99.70
     d00308 |          1        0.01       99.71
     d00316 |          1        0.01       99.72
     d00325 |          1        0.01       99.73
     d00329 |          2        0.02       99.75
     d00365 |          1        0.01       99.76
     d00405 |          1        0.01       99.77
     d00438 |          1        0.01       99.78
     d00468 |          1        0.01       99.79
     d00746 |          1        0.01       99.80
     d00787 |          1        0.01       99.81
     d01025 |          1        0.01       99.82
     d01348 |          1        0.01       99.83
     d01403 |          1        0.01       99.84
     d03041 |          1        0.01       99.85
     d03165 |          1        0.01       99.86
     d03182 |          2        0.02       99.88
     d03423 |          1        0.01       99.89
     d04109 |          1        0.01       99.90
     d04293 |          1        0.01       99.91
     d04374 |          1        0.01       99.92
     d04399 |          1        0.01       99.93
     d04500 |          1        0.01       99.94
     d04514 |          3        0.03       99.97
     d04611 |          1        0.01       99.98
     d04697 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016