Frequencies for first 10,000 rows of prescr2 variable in namcs2015 dataset :

Prescriptio |
   n status |
   code for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,821       38.21       38.21
          2 |        197        1.97       40.18
          3 |         89        0.89       41.07
          5 |      1,095       10.95       52.02
          . |      4,798       47.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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