Frequencies for first 10,000 rows of prescr4 variable in namcs1993 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        788        7.88        7.88
          2 |         91        0.91        8.79
          3 |         84        0.84        9.63
          . |      9,037       90.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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