Frequencies for first 10,000 rows of prescr6 variable in namcs2015 dataset :

Prescriptio |
   n status |
   code for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,402       14.02       14.02
          2 |         76        0.76       14.78
          3 |         44        0.44       15.22
          5 |        565        5.65       20.87
          . |      7,913       79.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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