Frequencies for first 10,000 rows of prescr5 variable in namcs1999 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        576        5.76        5.76
          2 |         83        0.83        6.59
          3 |         40        0.40        6.99
          . |      9,301       93.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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