Frequencies for first 10,000 rows of prescr3 variable in namcs2015 dataset :

Prescriptio |
   n status |
   code for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,868       28.68       28.68
          2 |        155        1.55       30.23
          3 |         70        0.70       30.93
          5 |        927        9.27       40.20
          . |      5,980       59.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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