Frequencies for first 10,000 rows of drugid8 variable in nhamcsed2006 dataset :

 medication |
  #8 - drug |
         id |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,955       99.55       99.55
     a51675 |          1        0.01       99.56
     a54655 |          4        0.04       99.60
     c00096 |          1        0.01       99.61
     c00110 |          2        0.02       99.63
     c00131 |          1        0.01       99.64
     d00022 |          1        0.01       99.65
     d00048 |          1        0.01       99.66
     d00049 |          1        0.01       99.67
     d00052 |          2        0.02       99.69
     d00096 |          1        0.01       99.70
     d00124 |          1        0.01       99.71
     d00134 |          1        0.01       99.72
     d00170 |          2        0.02       99.74
     d00179 |          1        0.01       99.75
     d00246 |          1        0.01       99.76
     d00265 |          1        0.01       99.77
     d00278 |          1        0.01       99.78
     d00280 |          1        0.01       99.79
     d00284 |          1        0.01       99.80
     d00308 |          1        0.01       99.81
     d00346 |          1        0.01       99.82
     d00350 |          1        0.01       99.83
     d00689 |          1        0.01       99.84
     d00746 |          2        0.02       99.86
     d00867 |          2        0.02       99.88
     d01115 |          1        0.01       99.89
     d01168 |          1        0.01       99.90
     d01321 |          1        0.01       99.91
     d03041 |          1        0.01       99.92
     d03431 |          1        0.01       99.93
     d03826 |          1        0.01       99.94
     d04050 |          1        0.01       99.95
     d04105 |          1        0.01       99.96
     d04214 |          1        0.01       99.97
     d04286 |          1        0.01       99.98
     d04803 |          1        0.01       99.99
     d05294 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016