Frequencies for first 10,000 rows of prescr6 variable in namcs2004 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        521        5.21        5.21
          2 |         84        0.84        6.05
          3 |         40        0.40        6.45
          . |      9,355       93.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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