Frequencies for first 10,000 rows of prescr6 variable in namcs1998 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        280        2.80        2.80
          2 |         47        0.47        3.27
          3 |         29        0.29        3.56
          . |      9,644       96.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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