Frequencies for first 10,000 rows of prescr22 variable in namcs2015 dataset :

Prescriptio |
   n status |
   code for |
 medication |
        #22 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         18        0.18        0.18
          2 |          2        0.02        0.20
          3 |          1        0.01        0.21
          5 |         13        0.13        0.34
          . |      9,966       99.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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