Frequencies for first 10,000 rows of prescr5 variable in namcs1993 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        413        4.13        4.13
          2 |         55        0.55        4.68
          3 |         44        0.44        5.12
          . |      9,488       94.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016