Frequencies for first 10,000 rows of med25 variable in namcs2015 dataset :

 Medication |
        #25 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,983       99.83       99.83
      06210 |          1        0.01       99.84
      11025 |          1        0.01       99.85
      18555 |          1        0.01       99.86
      19233 |          1        0.01       99.87
      28015 |          1        0.01       99.88
      29255 |          1        0.01       99.89
      91063 |          1        0.01       99.90
      93062 |          3        0.03       99.93
      93248 |          1        0.01       99.94
      94035 |          2        0.02       99.96
      96041 |          1        0.01       99.97
      98156 |          1        0.01       99.98
      99019 |          1        0.01       99.99
      99133 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017