Frequencies for first 10,000 rows of drugid25 variable in nhamcsed2014 dataset :

    Drug ID |
   code for |
 medication |
        #25 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,991       99.91       99.91
     d00050 |          1        0.01       99.92
     d00070 |          1        0.01       99.93
     d00168 |          1        0.01       99.94
     d00189 |          1        0.01       99.95
     d00272 |          1        0.01       99.96
     d00350 |          1        0.01       99.97
     d01024 |          1        0.01       99.98
     d01456 |          1        0.01       99.99
     d03140 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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